Statewide opinion polling for the 2020 Democratic Party presidential primaries

This is a list of statewide public opinion polls that have been conducted relating to the Democratic primaries for the 2020 United States presidential election. The persons named in the polls are declared candidates or have received media speculation about their possible candidacy.

Given the large number of potential candidates, the scores of certain low-polling and infrequently-polled candidates have been combined within the "other" column; their exact scores may be viewed by viewing the footnotes associated with each poll. The polls included are among Democrats or Democrats and Democratic-leaning independents, and do not include Republican-leaning independents. The statewide polls are ordered by the scheduled date of the state's primary or caucus. Open-ended polls are included and marked with an asterisk (*), but closed-ended versions of such polls are listed where possible. If multiple versions of polls are provided, the version used for debate qualification is prioritized, then the version among likely voters, then registered voters, then adults.

Key:

  Joe Biden

  Bernie Sanders

  Michael Bloomberg

  Elizabeth Warren

  3 or more candidates statistically tied for the lead

  No polling data in the past three months or three months before the election

Background

See also: 2020 Democratic Party presidential primaries § Timeline

The Democratic National Committee has determined that candidates may qualify for the first two Democratic primary debates either by polling at 1% or higher in at least three national or early-state (Iowa, New Hampshire, Nevada, and South Carolina) polls sponsored or conducted by designated organizations (in different regions if by the same organization) published after January 1, 2019, up until June 12, 2019, or by a fundraising threshold requiring at least 65,000 unique donors with at least 200 in 20 different states. Should more than 20 candidates meet either threshold, then candidates meeting both thresholds will be given highest priority for entry into the debates, followed by those with the highest polling average and those with the most donors. The pollsters and sponsors of polls designated for consideration by the DNC are the Associated Press, ABC News, CBS News, CNN, The Des Moines Register, Fox News, the Las Vegas Review-Journal, Monmouth University, NBC News, The New York Times, National Public Radio, Quinnipiac University, Reuters, the University of New Hampshire, USA Today, The Wall Street Journal, The Washington Post, and Winthrop University. Open-ended polls do not count towards the polling threshold.

For the third and fourth primary debates, candidates will be required to meet both polling and fundraising thresholds, with the prior considering only polls between June 28 and August 28, 2019, and increased to 4 qualifying polls at 2% support, now excluding surveys sponsored by the Las Vegas Review-Journal and Reuters; the latter requirement has also been increased, to 130,000 unique donors with at least 400 in 20 different states.

Individuals who have been included in national Democratic primary polls but have either ruled out their candidacy or not expressed interest in running include Stacey Abrams, Michael Avenatti, Sherrod Brown, Hillary Clinton, Mark Cuban, Andrew Cuomo, Al Franken, Eric Garcetti, Tim Kaine, Jason Kander, Joe Kennedy III, John Kerry, Mitch Landrieu, Terry McAuliffe, Chris Murphy, Gavin Newsom, Michelle Obama, Howard Schultz, Oprah Winfrey, and Mark Zuckerberg.

Polling in the four early primary states

The following Morning Consult weekly poll archive graph depicts the evolution of the standing of each candidate in the early primary states (Iowa, New Hampshire, Nevada and South Carolina) since February 2019.

Polling for Super Tuesday

The following Morning Consult graph depicts the evolution of the standing of each candidate in the March 3, 2020 Super Tuesday states (Alabama, Arkansas, California, Colorado, Maine, Massachusetts, Minnesota, North Carolina, Oklahoma, Tennessee, Texas, Utah, Vermont, and Virginia) since January 7, 2020.

Primary and caucus calendar

Democratic primary and caucus calendar by scheduled date
  February
  March 3 (Super Tuesday)
  March 10
  March 14–17
  March 24–29
  April 4–17
  April 28
  May
  June–August

The following dates reflect either the confirmed or expected dates of Democratic primaries and caucuses in 2020. Those for contests in U.S. territories with no date yet set are based on dates estimated by The Green Papers based on past years. The pledged delegate numbers listed below are based on the presidential votes in 2008, 2012, and 2016, as well as the number of electoral votes of each state in 2020. The number of DNC members and distinguished party leaders in the count of unpledged PLEO (party leaders and elected officials) delegates is based on the 2016 Democratic National Convention, while the number of unpledged officeholders (governors, members of Congress, and their equivalents in non-state jurisdictions) reflects their current total. The numbers of pledged delegates do not yet account for delegate bonuses or penalties from timing or clustering.

States listed with a lavender background and an asterisk (*) do not yet have a date set by existing statute. States with a light yellow background and a dagger (†) are set to shift their primary or caucus date following the expected passage of legislation moving the dates of their contests. If not already listed as such, the date to which the contest is expected to be moved is listed in parentheses. Party-run primaries (also described as either a firehouse primary or caucus in some jurisdictions) are listed with two asterisks (**).

2020 Democratic Primaries and Caucuses

Date	State/territory	Type	Eligibility	P	U	T
Feb 3	Iowa	Caucus	Closed	41	8	49
Feb 11	New Hampshire	Primary	Mixed	24	9	33
Feb 22	Nevada	Caucus	Closed	36	12	48
Feb 29	South Carolina	Primary	Open	54	9	63
Mar 3	Alabama	Primary	Open	52	9	61
	American Samoa*	Caucus	Open	6	5	11
	Arkansas	Primary	Open	31	5	36
	California	Primary	Mixed	416	79	495
	Colorado	Primary	Mixed	67	13	80
	Maine	Primary	Closed	24	8	32
	Massachusetts	Primary	Mixed	91	23	114
	Minnesota	Primary	Closed	75	17	92
	North Carolina	Primary	Mixed	110	12	122
	Oklahoma	Primary	Mixed	37	5	42
	Tennessee	Primary	Open	64	9	73
	Texas	Primary	Closed	228	34	262
	Utah	Primary	Mixed	29	6	35
	Vermont	Primary	Open	16	7	23
	Virginia	Primary	Open	99	25	124
Mar 3–10	Democrats Abroad	Caucus**	Open	13	4	17
Mar 10	Idaho	Primary	Closed	20	5	25
	Michigan	Primary	Open	125	22	147
	Mississippi	Primary	Open	36	5	41
	Missouri	Primary	Open	68	10	78
	North Dakota	Caucus**	Open	14	4	18
	Washington	Primary	Closed	89	18	107
Mar 14	Northern Marianas*	Caucus	Closed	6	5	11
Mar 17	Arizona	Primary	Closed	67	11	78
	Florida	Primary	Closed	219	29	248
	Illinois	Primary	Open	155	29	184
Apr 7	Wisconsin	Primary	Open	84	13	90
Apr 10	Alaska	Primary**	Closed	15	4	18
Apr 17	Wyoming	Caucus	Closed	13	4	17
Apr 28	Ohio	Primary	Mixed	136	17	153
May 2	Guam*	Caucus	Closed	7	5	11
	Kansas	Primary**	Closed	39	6	39
May 12	Nebraska	Primary	Mixed	29	4	29
May 19	Oregon	Primary	Closed	61	14	66
May 22	Hawaii	Primary**	Closed	24	9	31
Jun 2	Delaware	Primary	Closed	21	11	28
	District of Columbia†	Primary	Closed	20	26	43
	Indiana	Primary	Open	82	7	77
	Maryland	Primary	Closed	96	23	102
	Montana	Primary	Open	19	6	22
	New Mexico	Primary	Closed	34	11	40
	Pennsylvania	Primary	Closed	186	23	176
	Rhode Island	Primary	Mixed	26	9	30
	South Dakota	Primary	Mixed	16	5	19
Jun 6	Virgin Islands*	Caucus	Closed	7	6	13
Jun 9	Georgia	Primary	Open	105	15	120
	West Virginia	Primary	Mixed	28	6	30
Jun 23	Kentucky	Primary	Closed	54	6	52
	New York†	Primary	Closed	273	46	270
Jul 7	New Jersey	Primary	Mixed	126	21	128
Jul 11	Louisiana	Primary	Closed	54	7	57
Jul 12	Puerto Rico	Primary	Open	51	8	59
Aug 11	Connecticut	Primary	Closed	60	15	64
N/A	Unassigned	–	–	–	1	1
Total delegates				3,979	765	4,744

Iowa caucus

The Iowa Democratic caucus was held on February 3, 2020.

Sanders, Buttigieg, Warren and Biden campaigning in Iowa throughout the lead up to the caucus

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Pete Buttigieg	Elizabeth Warren	Amy Klobuchar	Andrew Yang	Tom Steyer	Other	Un- decided
270 to Win	Feb 3, 2020	Jan 22 – Feb 2, 2020	22.6%	18.2%	15.2%	15.6%	11.8%	3.8%	3.6%	3.6%	5.6%
RealClear Politics	Feb 3, 2020	Jan 20 – Feb 2, 2020	23.0%	19.3%	16.8%	15.5%	9.0%	3.3%	3.0%	2.5%	7.6%
FiveThirtyEight	Feb 3, 2020	until Feb 2, 2020	22.2%	20.7%	15.7%	14.5%	10.1%	3.7%	3.6%	2.9%	6.6%
Average			22.6%	19.4%	15.9%	15.2%	10.3%	3.6%	3.4%	3.0%	6.6%

The results of a final poll from The Des Moines Register were not released as scheduled on February 1, after an interviewee complained that Pete Buttigieg was not given as a poll option during their interview, with the omission reportedly attributed to human error. As the polling firm was unable to determine whether the mistake was an isolated incident or not, pollster Ann Selzer decided to withhold the results of the poll altogether, marking the first time in 76 years that the final pre-caucus poll was not released by the Register. The poll was later leaked on Twitter, with results confirmed by FiveThirtyEight showing Sanders in the lead with 22%, followed by Warren with 18%, Buttigieg with 16% and Biden with 13%.

  Debate qualifying poll as designated by the Democratic National Committee

Polling from December 1, 2019, to February 3, 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Pete Buttigieg	Tulsi Gabbard	Amy Klobuchar	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
Emerson College	Jan 30 – Feb 2, 2020	853 (LV)	± 3.3%	21%	15%	1%	11%	28%	4%	14%	5%	2%	–
Data for Progress [1]	Jan 28 – Feb 2, 2020	2,394 (LV)	± 1.6%	24%	22%	–	–	28%	–	25%	–	–	–
				18%	18%	2%	9%	22%	4%	19%	6%	2%	–
YouGov/CBS News (MRP)	Jan 22–31, 2020	1,835 (RV)	± 3%	25%	21%		5%	25%		16%
David Binder Research/Focus on Rural America	Jan 28–30, 2020	300 (LV)	± 5.7%	46%	–	–	–	40%	–	–	–	–	14%
				15%	19%	3%	11%	17%	3%	15%	1%	2%	12%
American Research Group	Jan 27–30, 2020	400 (LV)	± 4.0%	17%	9%	2%	16%	23%	3%	15%	5%	4%	6%
Civiqs/Data for Progress	Jan 26–29, 2020	615 (LV)	± 4.7%	20%	18%	1%	0%	31%	2%	25%	1%	1%	2%
				15%	15%	2%	8%	28%	2%	21%	5%	0%	2%
Park Street Strategies	Jan 24–28, 2020	600 (LV)	± 3.0%	20%	17%	1%	12%	18%	4%	17%	5%	<1%	6%
Monmouth University	Jan 23–27, 2020	544 (LV)	± 4.2%	29%	20%	–	–	25%	–	19%	–	1%	6%
				22%	17%	–	12%	22%	–	16%	5%	<1%	6%
				23%	16%	1%	10%	21%	4%	15%	3%	1%	5%
Civiqs/Iowa State University	Jan 23–27, 2020	655 (LV)	± 4.8%	15%	17%	2%	11%	24%	4%	19%	5%	2%	3%
Emerson College	Jan 23–26, 2020	450 (LV)	± 4.6%	21%	10%	5%	13%	30%	5%	11%	5%	2%	–
Suffolk University/USA Today	Jan 23–26, 2020	500 (LV)	± 4.4%	25.4%	17.6%	0.8%	5.6%	18.6%	2.2%	13.2%	3.0%	13.6%	–
Change Research/Crooked Media	Jan 22–26, 2020	704 (LV)	± 3.7%	22%	23%	–	–	30%	–	20%	–	–	5%
				18%	19%	1%	10%	27%	4%	15%	4%	2%	–
Siena College/New York Times	Jan 20–23, 2020	584 (LV)	± 4.8%	23%	23%	–	–	30%	–	19%	–	–	8%
				17%	18%	1%	8%	25%	3%	15%	3%	1%	8%
Morningside College	Jan 17–23, 2020	253 (LV)	± 6.2%	19%	18%	3%	12%	15%	6%	15%	4%	2%	4%
YouGov/CBS News	Jan 16–23, 2020	1401 (RV)	± 3.9%	25%	22%	0%	7%	26%	1%	15%	1%	2%	1%
Civiqs/Data for Progress	Jan 19–21, 2020	590 (LV)	± 4.8%	17%	19%	2%	6%	24%	3%	19%	5%	0%	5%
David Binder Research/Focus on Rural America	Jan 15–18, 2020	500 (LV)	± 4.4%	24%	16%	1%	11%	14%	4%	18%	3%	2%	–
Neighbourhood Research and Media/Breitbart	Jan 14–17, 2020	300 (LV)	± 4.8%	23%	17%	–	11%	10%	2%	15%	2%	6%	13%
	Jan 13, 2020	Booker withdraws from the race
Monmouth University	Jan 9–12, 2020	405 (LV)	± 4.9%	28%	25%	–	–	24%	–	16%	–	2%	4%
				24%	17%	2%	8%	18%	4%	15%	4%	4%	5%
Selzer/CNN/Des Moines Register	January 2–8, 2020	701 (LV)	± 3.7%	15%	16%	2%	6%	20%	2%	17%	5%	2%	11%
YouGov/CBS News	Dec 27, 2019 – Jan 3, 2020	953 (RV)	± 3.8%	23%	23%	1%	7%	23%	2%	16%	2%	2%	1%
KG Polling	Dec 19–23, 2019	750 (LV)	± 3.8%	24%	12%	–	5%	31%	–	13%	10%	–	5%
Civiqs/Iowa State University	Dec 12–16, 2019	632 (LV)	± 4.9%	15%	24%	3%	4%	21%	2%	18%	3%	4%	4%
Emerson College	Dec 7–10, 2019	325 (LV)	± 5.4%	23%	18%	2%	10%	22%	3%	12%	2%	8%	–
	Dec 3, 2019	Harris withdraws from the race

Polling during November 2019
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Pete Buttigieg	Tulsi Gabbard	Kamala Harris	Amy Klobuchar	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
Civiqs/Iowa State University	Nov 15–19, 2019	614 (LV)	± 4.9%	12%	26%	2%	2%	5%	18%	2%	19%	4%	6%	3%
Des Moines Register/CNN	Nov 8–13, 2019	500 (LV)	± 4.4%	15%	25%	3%	3%	6%	15%	3%	16%	3%	6%	5%
YouGov/CBS News	Nov 6–13, 2019	856 (RV)	± 4.1%	22%	21%	0%	5%	5%	22%	2%	18%	1%	4%	–
Monmouth University	Nov 7–11, 2019	451 (LV)	± 4.6%	19%	22%	2%	3%	5%	13%	3%	18%	3%	6%	8%
University of Iowa	Oct 28 – Nov 10, 2019	465 (LV)	± 4.6%	15%	16%	3%	2%	1%	18%	3%	23%	3%	2%	13%
Public Policy Polling	Nov 5–6, 2019	715 (LV)	–	13%	20%	–	3%	9%	14%	6%	21%	3%	–	10%
Quinnipiac University	Oct 30 – Nov 5, 2019	698 (LV)	± 4.5%	15%	19%	3%	4%	5%	17%	3%	20%	3%	4%	8%
	Nov 1, 2019	O'Rourke withdraws from the race

Polling before November 2019
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
Siena College/New York Times	Oct 25–30, 2019	439 (LV)	± 4.7%	17%	2%	18%	3%	4%	1%	19%	22%	8%	6%
Civiqs/Iowa State University	Oct 18–22, 2019	598 (LV)	± 5%	12%	1%	20%	3%	4%	1%	18%	28%	8%	4%
Suffolk University/USA Today	Oct 16–18, 2019	500 (LV)	± 4.4%	18%	1%	13%	3%	3%	1%	9%	17%	7%	29%
Emerson College	Oct 13–16, 2019	317 (LV)	± 5.5%	23%	3%	16%	2%	1%	0%	13%	23%	15%	–
Firehouse Strategies/Øptimus	Oct 8–10, 2019	548 (LV)	± 3.6%	22%	2%	17%	3%	–	1%	5%	25%	26%	–
YouGov/CBS News	Oct 3–11, 2019	729 (RV)	± 4.6%	22%	2%	14%	5%	2%	2%	21%	22%	7%	–
Selzer/CNN/Des Moines Register [2]	Sep 14–18, 2019	602 (LV)	± 4.0%	20%	3%	9%	6%	3%	2%	11%	22%	11%	14%
David Binder Research	Sep 14–17, 2019	500 (LV)	± 4.4%	25%	2%	12%	5%	8%	1%	9%	23%	9%	6%
Civiqs/Iowa State University	Sep 13–17, 2019	572 (LV)	± 5.2%	16%	2%	13%	5%	3%	2%	16%	24%	11%	8%
YouGov/CBS News	Aug 28 – Sep 4, 2019	835	± 4.3%	29%	2%	7%	6%	2%	2%	26%	17%	9%	–
Change Research	Aug 9–11, 2019	621 (LV)	± 3.9%	17%	3%	13%	8%	2%	3%	17%	28%	9%	–
Monmouth University	Aug 1–4, 2019	401 (LV)	± 4.9%	28%	1%	8%	11%	3%	<1%	9%	19%	11%	10%
Firehouse Strategies/Øptimus	Jul 23–25, 2019	630	± 3.3%	23%	2%	7%	12%	–	2%	11%	23%	4%	16%
YouGov/CBS News	Jul 9–18, 2019	706	± 4.4%	24%	3%	7%	16%	4%	1%	19%	17%	9%	–
	Jul 9, 2019	Steyer announces his candidacy
Change Research	Jun 29 – Jul 4, 2019	420 (LV)	–	16%	1%	25%	16%	1%	2%	16%	18%	5%	–
David Binder Research	Jun 29 – Jul 1, 2019	600	± 4.0%	17%	2%	10%	18%	4%	1%	12%	20%	9%	9%
Suffolk University/USA Today	Jun 28 – Jul 1, 2019	500	± 4.4%	24%	2%	6%	16%	2%	1%	9%	13%	6%	21%
Change Research	Jun 17–20, 2019	308 (LV)	–	27%	5%	17%	4%	2%	1%	18%	20%	7%	–
Selzer/CNN/Des Moines Register	Jun 2–5, 2019	600	± 4.0%	24%	1%	14%	7%	2%	2%	16%	15%	6%	6%
Change Research	May 15–19, 2019	615 (LV)	± 3.9%	24%	1%	14%	10%	2%	5%	24%	12%	9%	–
Firehouse Strategies/Øptimus	Apr 30 – May 2, 2019	576	± 4.1%	35%	2%	11%	5%	4%	3%	14%	10%	–	16%
	Apr 25, 2019	Biden announces his candidacy
Gravis Marketing	Apr 17–18, 2019	590	± 4.0%	19%	4%	14%	6%	4%	5%	19%	6%	7%	16%
	Apr 14, 2019	Buttigieg announces his candidacy
Monmouth University	Apr 4–9, 2019	351	± 5.2%	27%	3%	9%	7%	4%	6%	16%	7%	7%	12%
David Binder Research	Mar 21–24, 2019	500	± 4.4%	25%	7%	6%	9%	6%	6%	17%	8%	9%	7%
Emerson College	Mar 21–24, 2019	249	± 6.2%	25%	6%	11%	10%	2%	5%	24%	9%	8%	–
Public Policy Polling (D)	Mar 14–15, 2019	678	–	29%	4%	–	5%	6%	7%	15%	8%	4%	22%
	Mar 14, 2019	O'Rourke announces his candidacy
Selzer/CNN/Des Moines Register	Mar 3–6, 2019	401	± 4.9%	27%	3%	1%	7%	3%	5%	25%	9%	5%	10%
	Feb 19, 2019	Sanders announces his candidacy
	Feb 10, 2019	Klobuchar announces her candidacy
	Feb 9, 2019	Warren announces her candidacy
Firehouse Strategies/Øptimus	Jan 31 – Feb 2, 2019	558	± 3.6%	25%	4%	–	17%	5%	4%	10%	11%	1%	25%
Emerson College	Jan 30 – Feb 2, 2019	260	± 6.0%	29%	4%	0%	18%	3%	6%	15%	11%	15%	–
	Feb 1, 2019	Booker announces his candidacy
	Jan 21, 2019	Harris announces her candidacy
	Jan 11, 2019	Gabbard announces her candidacy
Change Research	Dec 13–17, 2018	1,291 (LV)	–	20%	4%	–	7%	5%	19%	20%	7%	18%	–
Selzer/CNN/Des Moines Register	Dec 10–13, 2018	455	± 4.6%	32%	4%	–	5%	3%	11%	19%	8%	7%	6%
David Binder Research	Dec 10–11, 2018	500	± 4.4%	30%	6%	–	7%	10%	11%	13%	9%	8%	6%
David Binder Research	Sep 20–23, 2018	500	± 4.4%	37%	8%	–	10%	–	–	12%	16%	6%	9%
	Nov 6, 2017	Yang announces his candidacy
Public Policy Polling (D)	Mar 3–6, 2017	1,062	–	–	17%	–	3%	11%	–	–	–	34%	32%

New Hampshire primary

The New Hampshire Democratic primary was held on February 11, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Pete Buttigieg	Elizabeth Warren	Joe Biden	Amy Klobuchar	Andrew Yang	Tulsi Gabbard	Tom Steyer	Other	Un- decided
270 to Win	Feb 10, 2020	Feb 4–9, 2020	27.3%	20.9%	13.1%	12.3%	10.3%	3.0%	2.7%	2.1%	1.9%	6.4%
RealClear Politics	Feb 10, 2020	Feb 6–9, 2020	28.7%	21.3%	11.0%	11.0%	11.7%	3.7%	3.3%	1.7%	1.3%	6.3%
FiveThirtyEight	Feb 10, 2020	until Feb 10, 2020	26.0%	21.6%	12.5%	11.7%	10.3%	3.0%	2.9%	2.6%	3.5%	5.8%
Average			27.3%	21.3%	12.2%	11.7%	10.8%	3.2%	3.0%	2.1%	2.2%	6.2%
New Hampshire primary results (February 11, 2020)			25.6%	24.3%	9.2%	8.4%	19.7%	2.8%	3.3%	3.6%	2.7%	–

   – Debate qualifying poll as designated by the Democratic National Committee

Polling from January 1, 2020, to February 11, 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Pete Buttigieg	Tulsi Gabbard	Amy Klobuchar	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
New Hampshire primary (popular vote)	Feb 11, 2020	–	–	8.4%	24.3%	3.3%	19.7%	25.6%	3.6%	9.2%	2.8%	2.7%	–
AtlasIntel	Feb 8–10, 2020	431 (LV)	± 5.0%	12%	24%	3%	14%	24%	1%	11%	5%	–	6%
Data For Progress	Feb 7–10, 2020	1296 (LV)	± 2.7%	9%	26%	3%	13%	28%	3%	14%	5%	–	–
American Research Group	Feb 8–9, 2020	400 (LV)	–	13%	20%	3%	13%	28%	2%	11%	3%	5%	2%
Emerson College/WHDH	Feb 8–9, 2020	500 (LV)	± 4.3%	10%	23%	2%	14%	30%	2%	11%	4%	4%	–
Change Research	Feb 8–9, 2020	662 (LV)	± 3.8%	9%	21%	6%	8%	30%	3%	8%	5%	1%	9%
Suffolk University/Boston Globe/WBZ-TV	Feb 8–9, 2020	500 (LV)	± 4.4%	12%	19%	3%	14%	27%	2%	12%	3%	3%	7%
Elucd	Feb 7–9, 2020	492 (LV)	± 4.4%	8%	20%	–	12%	26%	–	10%	–	–	15%
University of New Hampshire/CNN	Feb 6–9, 2020	365 (LV)	± 5.1%	11%	22%	5%	7%	29%	1%	10%	4%	1%	10%
Emerson College/WHDH	Feb 7–8, 2020	500 (LV)	± 4.3%	11%	20%	3%	13%	30%	2%	12%	4%	4%	–
Suffolk University/Boston Globe/WBZ-TV	Feb 7–8, 2020	500 (LV)	± 4.4%	10%	22%	2%	9%	24%	2%	13%	3%	3%	12%
Boston Herald/FPU/NBC10	Feb 5–8, 2020	512 (LV)	–	14%	20%	0%	6%	23%	2%	16%	3%	3%	13%
YouGov/CBS News	Feb 5–8, 2020	848 (LV)	± 4.3%	12%	25%	2%	10%	29%	1%	17%	1%	3%	–
University of New Hampshire/CNN	Feb 5–8, 2020	384 (LV)	± 5.0%	12%	21%	5%	6%	28%	2%	9%	4%	2%	11%
Emerson College/WHDH	Feb 6–7, 2020	500 (LV)	± 4.3%	11%	24%	5%	9%	31%	2%	11%	3%	3%	–
Suffolk University/Boston Globe/WBZ-TV	Feb 6–7, 2020	500 (LV)	± 4.4%	11%	25%	2%	6%	24%	2%	14%	3%	4%	9%
University of Massachusetts Lowell	Feb 4–7, 2020	440 (LV)	± 6.5%	14%	17%	4%	8%	25%	5%	15%	3%	5%	4%
University of New Hampshire/CNN	Feb 4–7, 2020	365 (LV)	± 5.1%	11%	21%	6%	5%	28%	3%	9%	3%	3%	11%
Emerson College/WHDH	Feb 5–6, 2020	500 (LV)	± 4.3%	11%	23%	6%	9%	32%	2%	13%	2%	3%	–
Suffolk University/Boston Globe/WBZ-TV	Feb 5–6, 2020	500 (LV)	± 4.4%	11%	23%	4%	6%	24%	3%	13%	3%	4%	12%
Marist/NBC News	Feb 4–6, 2020	709 (LV)	± 4.7%	13%	21%	3%	8%	25%	4%	14%	4%	3%	5%
Suffolk University/Boston Globe/WBZ-TV	Feb 4–5, 2020	500 (LV)	± 4.4%	12%	19%	5%	6%	25%	4%	11%	2%	1%	15%
Monmouth University	Feb 3–5, 2020	503 (LV)	± 4.4%	17%	20%	4%	9%	24%	3%	13%	4%	2%	5%
				17%	22%	–	13%	27%	–	13%	–	3%	4%
				19%	28%	–	–	28%	–	16%	–	3%	5%
Emerson College/WHDH	Feb 3–5, 2020	500 (LV)	± 4.3%	12%	21%	5%	11%	31%	1%	12%	4%	2%	–
Suffolk University/Boston Globe/WBZ-TV	Feb 3–4, 2020	500 (LV)	± 4.4%	15%	15%	5%	6%	24%	5%	10%	3%	1%	14%
Emerson College/WHDH	Feb 2–4, 2020	500 (LV)	± 4.3%	13%	17%	6%	11%	32%	2%	11%	6%	3%	–
	Feb 3, 2020	Iowa caucuses
Suffolk University/Boston Globe/WBZ-TV	Feb 2–3, 2020	500 (LV)	± 4.4%	18%	11%	5%	6%	24%	4%	13%	3%	3%	14%
Emerson College/WHDH	Feb 1–3, 2020	500 (LV)	± 4.3%	13%	12%	4%	12%	32%	5%	13%	5%	4%	–
Emerson College/WHDH	Jan 31 – Feb 2, 2020	500 (LV)	± 4.3%	14%	13%	7%	8%	29%	8%	12%	7%	2%	–
Saint Anselm College	Jan 29 – Feb 2, 2020	491 (LV)	± 4.4%	19%	14%	3%	11%	19%	5%	11%	4%	2%	11%
Boston Herald/FPU/NBC10 [3]	Jan 29 – Feb 1, 2020	454 (LV)	± 4.6%	24%	8%	3%	4%	31%	No voters	17%	1%	5%	7%
University of Massachusetts Lowell	Jan 28–31, 2020	400 (LV)	± 6.4%	22%	12%	5%	6%	23%	6%	19%	2%	1%	4%
YouGov/UMass Amherst/WCVB	Jan 17–29, 2020	500 (LV)	± 5.3%	20%	12%	5%	5%	25%	5%	17%	4%	2%	3%
American Research Group	Jan 24–27, 2020	600 (LV)	± 4%	13%	12%	8%	7%	28%	2%	11%	5%	8%	6%
Boston Herald/FPU/NBC10	Jan 23–26, 2020	407 (LV)	± 4.9%	22%	10%	3%	5%	29%	0%	16%	1%	7%	9%
Marist/NBC News	Jan 20–23, 2020	697 (LV)	± 4.5%	15%	17%	6%	10%	22%	3%	13%	5%	2%	7%
University of New Hampshire/CNN	Jan 15–23, 2020	516 (LV)	± 4.3%	16%	15%	5%	6%	25%	2%	12%	5%	2%	10%
MassINC Polling Group/WBUR	Jan 17–21, 2020	426 (LV)	± 4.8%	14%	17%	5%	6%	29%	2%	13%	5%	4%	5%
Suffolk University/Boston Globe	Jan 15–19, 2020	500 (LV)	± 4.4%	15%	12%	5%	5%	16%	3%	10%	6%	3%	24%
Emerson College/WHDH	Jan 13–16, 2020	657 (LV)	± 3.8%	14%	18%	5%	10%	23%	4%	14%	6%	7%	–
	Jan 13, 2020	Booker withdraws from the race
Boston Herald/FPU/NBC10	Jan 8–12, 2020	434 (LV)	–	26%	7%	4%	2%	22%	2%	18%	2%	7%	12%
Patinkin Research Strategies/Yang 2020	Jan 5–7, 2020	600 (LV)	± 4%	21%	17%	7%	6%	19%	6%	10%	5%	3%	7%
Monmouth University	Jan 3–7, 2020	404 (LV)	± 4.9%	19%	20%	4%	6%	18%	4%	15%	3%	3%	7%
				21%	20%	–	7%	21%	–	15%	5%	5%	8%
				24%	23%	–	–	21%	–	18%	–	5%	8%
YouGov/CBS News	Dec 27, 2019 – Jan 3, 2020	487 (LV)	± 5.3%	25%	13%	1%	7%	27%	3%	18%	2%	3%	–

Polling before January 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Tulsi Gabbard	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Deval Patrick	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
MassINC Polling Group/WBUR	Dec 3–8, 2019	442 (LV)	± 4.7%	17%	1%	18%	5%	–	3%	–	<1%	15%	12%	5%	11%	12%
	Dec 3, 2019	Harris withdraws from the race
Emerson College	Nov 22–26, 2019	549 (LV)	± 4.1%	14%	2%	22%	6%	4%	2%	–	0%	26%	14%	5%	7%	–
Boston Globe/Suffolk University	Nov 21–24, 2019	500 (LV)	–	12%	2%	13%	6%	3%	1%	–	1%	16%	14%	4%	6%	21%
Saint Anselm College	Nov 13–18, 2019	255 (RV)	± 6.1%	15%	3%	25%	3%	1%	6%	–	0%	9%	15%	2%	5%	13%
	Nov 14, 2019	Patrick announces his candidacy
YouGov/CBS News	Nov 6–13, 2019	535 (RV)	± 5%	22%	1%	16%	0%	3%	3%	–	–	20%	31%	1%	1%	–
Quinnipiac University	Nov 6–10, 2019	1,134 (LV)	± 3.8	20%	1%	15%	6%	1%	3%	–	–	14%	16%	4%	5%	14%
	Nov 1, 2019	O'Rourke withdraws from the race
University of New Hampshire/CNN	Oct 21–27, 2019	574 (LV)	± 4.1%	15%	2%	10%	5%	3%	5%	2%	–	21%	18%	5%	4%	10%
Boston Herald/FPU	Oct 9–13, 2019	422 (LV)	± 4.8%	24%	2%	9%	1%	4%	2%	0%	–	22%	25%	1%	4%	7%
Firehouse Strategies/Øptimus	Oct 8–10, 2019	610 (LV)	± 3.7%	18%	2%	7%	–	2%	–	1%	–	9%	25%	2%	32%	–
YouGov/CBS News	Oct 3–11, 2019	506	± 5.4%	24%	1%	7%	2%	4%	2%	1%	–	17%	32%	5%	5%	–
Saint Anselm College	Sep 25–29, 2019	423	± 4.8%	24%	1%	10%	3%	5%	3%	<1%	–	11%	25%	2%	3%	9%
Monmouth University	Sep 17–21, 2019	401	± 4.9%	25%	2%	10%	2%	3%	2%	1%	–	12%	27%	2%	3%	9%
HarrisX/No Labels	Sep 6–11, 2019	595	± 4.0%	22%	3%	5%	6%	5%	1%	1%	–	21%	15%	2%	5%	14%
Boston Herald/FPU	Sep 4–10, 2019	425	± 4.8%	21%	1%	5%	3%	6%	1%	2%	–	29%	17%	5%	2%	9%
Emerson College	Sep 6–9, 2019	483	± 4.4%	24%	4%	11%	6%	8%	1%	1%	–	13%	21%	3%	7%	–
YouGov/CBS News	Aug 28 – Sep 4, 2019	526	± 5.2%	26%	2%	8%	1%	7%	1%	1%	–	25%	27%	1%	1%	–
Gravis Marketing	Aug 2–6, 2019	250	± 6.2%	15%	0%	8%	5%	7%	4%	2%	–	21%	12%	4%	8%	11%
Suffolk University	Aug 1–4, 2019	500	± 4.4%	21%	1%	6%	3%	8%	1%	0%	–	17%	14%	1%	6%	21%
Firehouse Strategies/Øptimus	Jul 23–25, 2019	587	± 3.3%	21%	1%	8%	–	13%	–	0%	–	13%	16%	1%	7%	19%
YouGov/CBS News	Jul 9–18, 2019	530	± 5%	27%	1%	7%	2%	12%	1%	2%	–	20%	18%	1%	5%	–
University of New Hampshire/CNN	Jul 8–15, 2019	386	± 5.0%	24%	2%	10%	1%	9%	0%	2%	–	19%	19%	1%	4%	9%
Saint Anselm College	Jul 10–12, 2019	351	± 5.2%	21%	1%	12%	1%	18%	3%	0%	–	10%	17%	5%	3%	11%
Change Research	Jul 6–9, 2019	1,084	± 3.0%	19%	1%	13%	3%	15%	1%	1%	–	20%	22%	1%	3%	–
Change Research	Jun 29 – Jul 4, 2019	420	–	13%	2%	14%	2%	13%	1%	2%	–	26%	24%	2%	4%	–
Change Research	Jun 17–20, 2019	308	–	24%	0%	14%	1%	3%	1%	4%	–	28%	21%	1%	3%	–
YouGov/CBS News	May 31 – Jun 12, 2019	502	± 4.9%	33%	3%	10%	0%	7%	1%	4%	–	20%	17%	1%	2%	–
Tel Opinion Research*	May 20–22, 2019	600	± 4.0%	33%	–	7%	–	7%	–	1%	–	12%	11%	–	–	28%
Monmouth University	May 2–7, 2019	376	± 5.1%	36%	2%	9%	0%	6%	2%	2%	–	18%	8%	1%	2%	11%
Change Research	May 3–5, 2019	864	± 3.3%	26%	2%	12%	1%	8%	1%	3%	–	30%	9%	2%	4%	–
Firehouse Strategies/Øptimus	Apr 30 – May 2, 2019	551	± 4.0%	34%	1%	10%	–	7%	1%	3%	–	16%	9%	–	–	19%
Suffolk University	Apr 25–28, 2019	429	± 4.7%	20%	3%	12%	1%	6%	1%	3%	–	12%	8%	1%	4%	27%
	Apr 25, 2019	Biden announces his candidacy
University of New Hampshire	Apr 10–18, 2019	241	± 6.3%	18%	3%	15%	1%	4%	2%	3%	–	30%	5%	2%	5%	12%
	Apr 14, 2019	Buttigieg announces his candidacy
Saint Anselm College	Apr 3–8, 2019	326	± 5.4%	23%	4%	11%	1%	7%	2%	6%	–	16%	9%	–	9%	13%
	Mar 14, 2019	O'Rourke announces his candidacy
University of New Hampshire	Feb 18–26, 2019	240	± 6.3%	22%	3%	1%	1%	10%	4%	5%	–	26%	7%	–	6%	14%
Emerson College	Feb 21–22, 2019	405	± 4.8%	25%	5%	1%	–	12%	8%	5%	–	27%	9%	–	10%	–
	Feb 19, 2019	Sanders announces his candidacy
YouGov/UMass Amherst	Feb 7–15, 2019	337	± 6.4%	28%	3%	–	–	14%	1%	6%	–	20%	9%	–	9%	9%
	Feb 10, 2019	Klobuchar announces her candidacy
	Feb 9, 2019	Warren announces her candidacy
Firehouse Strategies/Øptimus	Jan 31 – Feb 2, 2019	518	± 4.1%	22%	4%	–	–	13%	2%	2%	–	13%	9%	–	0%	35%
	Feb 1, 2019	Booker announces his candidacy
	Jan 21, 2019	Harris announces her candidacy
	Jan 11, 2019	Gabbard announces her candidacy
Change Research	Jan 2–3, 2019	1,162	–	24%	3%	–	–	4%	2%	9%	–	26%	11%	–	22%	–
University of New Hampshire	Aug 2–19, 2018	198	± 7.0%	19%	6%	–	–	3%	–	–	–	30%	17%	–	12%	12%
Suffolk University	Apr 26–30, 2018	295	± 5.7%	20%	8%	–	–	4%	–	–	4%	13%	26%	–	4%	18%
				30%	10%	–	–	6%	–	–	8%	25%	–	–	6%	12%
University of New Hampshire	Apr 13–22, 2018	188	± 7.1%	26%	5%	–	–	6%	1%	–	–	28%	11%	–	9%	13%
University of New Hampshire	Jan 28 – Feb 10, 2018	219	± 6.6%	35%	3%	–	–	1%	0%	–	–	24%	15%	–	7%	15%
	Nov 6, 2017	Yang announces his candidacy
University of New Hampshire	Oct 3–15, 2017	212	± 6.7%	24%	6%	–	–	1%	1%	–	–	31%	13%	–	14%	11%

Head-to-head polls
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Pete Buttigieg	Bernie Sanders	Elizabeth Warren	Undecided
Tel Opinion Research	May 20–22, 2019	600	± 4.0%	63%	21%	–	–	15%
				66%	–	22%	–	13%
				58%	–	–	29%	13%
American Research Group	Mar 21–27, 2018	400	± 5.0%	47%	–	45%	–	7%
				58%	–	–	33%	8%

Nevada caucus

The Nevada Democratic caucus was held on February 22, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Pete Buttigieg	Elizabeth Warren	Tom Steyer	Amy Klobuchar	Others	Undecided
270 to Win	Feb 21, 2020	Feb 14–21, 2020	30.0%	16.7%	14.0%	13.7%	9.7%	9.7%	1.3%	4.9%
RealClear Politics	Feb 21, 2020	Feb 19–21, 2020	32.5%	16.0%	16.0%	14.0%	9.0%	9.5%	2.0%	1.0%
FiveThirtyEight	Feb 21, 2020	until Feb 21, 2020	30.5%	14.4%	15.3%	11.8%	10.2%	8.9%	11.0%	–
Average			31.0%	15.7%	15.1%	13.2%	9.6%	9.4%	4.7%	2.0%
Nevada caucus results, first alignment (February 22, 2020)			34.0%	17.6%	15.4%	12.8%	9.1%	9.6%	1.5%	–

   – Debate qualifying poll as designated by the Democratic National Committee

Tabulation of individual polls of the 2020 Nevada Democratic Caucus
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
Nevada caucuses (first alignment vote)	Feb 22, 2020	–	–	17.6%	–	15.4%	–	9.6%	–	34%	9.1%	12.8%	0.6%	1%	–
Data for Progress[4]	Feb 19–21, 2020	1010 (LV)	± 2.8%	16%	–	15%	–	8%	–	35%	8%	16%	–	2%	–
AtlasIntel	Feb 19–21, 2020	517 (LV)	± 4.0%	11%	–	14%	–	5%	–	38%	11%	9%	–	7%	5%
Emerson College	Feb 19–20, 2020	425 (LV)	± 4.7%	16%	–	17%	–	11%	–	30%	10%	12%	–	4%	–
	Feb 15–18, 2020	Early voting occurred in the Nevada caucuses
Point Blank Political	Feb 13–15, 2020	256 (LV)	± 5.6%	14.3%	–	12.6%	–	15.6%	–	13%	18.6%	7.1%	–	1.7%	17.1%
Beacon Research/Tom Steyer	Feb 12–15, 2020	600 (LV)	–	19%	–	13%	–	7%	–	24%	18%	10%	–	4%	6%
Data for Progress[5]	Feb 12–15, 2020	766 (LV)	± 3.4%	14%	–	15%	–	9%	–	35%	10%	16%	–	2%	–
WPA Intelligence/Las Vegas Review-Journal/AARP Nevada	Feb 11–13, 2020	413 (LV)	± 4.8%	18%	–	10%	–	10%	–	25%	11%	13%	–	5%	8%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
	Jan 13, 2020	Booker withdraws from the race
Suffolk University/USA Today[6]	Jan 8–11, 2020	500 (LV)	± 4.4%	19%	2%	8%	–	4%	–	18%	8%	11%	4%	4%	22%
https://www.yang2020.com/wp-content/uploads/Myers-Research-Nevada.pdf Archived January 11, 2020, at the Wayback Machine	Jan 5–8, 2020	635	± 4.0%	23%	3%	6%	–	2%	–	17%	12%	12%	4%	13%	6%
	Dec 3, 2019	Harris withdraws from the race
YouGov/CBS News	Nov 6–13, 2019	708 (RV)	± 4.7%	33%	2%	9%	4%	2%	–	23%	2%	21%	1%	2%	–
Fox News	Nov 10–13, 2019	627	± 4.0%	24%	1%	8%	4%	2%	–	18%	5%	18%	3%	4%	10%
Emerson Polling	Oct 31 – Nov 2, 2019	451 (LV)	± 4.6%	30%	1%	5%	5%	1%	–	19%	3%	22%	5%	10%	–
Mellman Group/The Nevada Independent	Oct 28 – Nov 2, 2019	600 (LV)	± 4.0%	29%	1%	7%	3%	3%	0%	19%	4%	19%	3%	3%	9%
	Nov 1, 2019	O'Rourke withdraws from the race
CNN/SSRS	Sep 22–26, 2019	324 (LV)	± 7.1%	22%	2%	4%	5%	1%	0%	22%	4%	18%	3%	3%	13%
Suffolk University/USA Today	Sep 19–23, 2019	500 (LV)	–	23%	2%	3%	4%	0%	1%	14%	3%	19%	3%	4%	21%
YouGov/CBS News	Aug 28 – Sep 4, 2019	563 (LV)	± 4.9%	27%	1%	4%	6%	0%	3%	29%	2%	18%	1%	9%	–
Gravis Marketing	Aug 14–16, 2019	382 (RV)	± 5.0%	25%	3%	5%	9%	2%	0%	10%	6%	15%	2%	13%	9%
Change Research	Aug 2–8, 2019	439 (LV)	± 4.7%	26%	0%	7%	10%	1%	2%	22%	3%	23%	1%	5%	–
Morning Consult	Jul 1–21, 2019	749 (RV)	± 4.0%	29%	3%	6%	11%	1%	3%	23%	1%	12%	3%	10%	–
	Jul 9, 2019	Steyer announces his candidacy
Monmouth University	Jun 6–11, 2019	370 (LV)	± 5.1%	36%	2%	7%	6%	1%	2%	13%	–	19%	2%	3%	8%
Change Research	May 9–12, 2019	389 (LV)	–	29%	2%	13%	11%	1%	4%	24%	–	12%	1%	4%	–
	Apr 25, 2019	Biden announces his candidacy
	Apr 14, 2019	Buttigieg announces his candidacy
Emerson College	Mar 28–30, 2019	310 (LV)	± 5.5%	26%	2%	5%	9%	2%	10%	23%	–	10%	3%	9%	–

South Carolina primary

The South Carolina Democratic primary was held on February 29, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tom Steyer	Pete Buttigieg	Elizabeth Warren	Amy Klobuchar	Tulsi Gabbard	Un- decided
270 to Win	Feb 28, 2020	Feb 23–27, 2020	35.8%	20.2%	13.4%	10.0%	8.2%	5.0%	2.6%	4.8%
RealClear Politics	Feb 28, 2020	Feb 23–27, 2020	39.7%	24.3%	11.7%	11.3%	6.0%	5.7%	2.3%	–
FiveThirtyEight	Feb 28, 2020	until Feb 27, 2020	38.4%	19.1%	12.4%	8.5%	7.0%	4.3%	2.6%	7.7%
Average			38.0%	21.2%	12.5%	9.9%	7.1%	5.0%	2.5%	4.9%
South Carolina primary results (February 29, 2020)			48.7%	19.8%	11.3%	8.2%	7.1%	3.1%	1.3%	–

   – Debate qualifying poll as designated by the Democratic National Committee

Polling in January and February 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Tulsi Gabbard	Amy Klobuchar	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
South Carolina primary (popular vote)	Feb 29, 2020	–	–	48.65%	–	8.2%	1.26%	3.13%	19.77%	11.34%	7.07%	0.2%	0.38%	–
Atlas Intel	Feb 25–28, 2020	477 (LV)	± 4.0%	35%	–	8%	2%	4%	24%	12%	7%	–	2%	6%
Emerson College	Feb 26–27, 2020	550 (LV)	± 4.1%	41%	–	11%	2%	6%	25%	11%	5%	–	–	–
Trafalgar Group	Feb 26–27, 2020	1,081 (LV)	± 2.99%	43.9%	–	9.6%	1.7%	5.9%	22.8%	10.5%	5.6%	–	–	–
Data for Progress	Feb 23–27, 2020	1416 (LV)	± 2.6%	34%	–	13%	3%	5%	25%	13%	7%	–	–	–
Change Research [7]/ Post and Courier	Feb 23–27, 2020	543 (LV)	± 5.1%	28%	–	11%	5%	4%	24%	16%	12%	–	–	1%
Starboard Communications	Feb 26, 2020	1,102 (LV)	± 2.82%	40%	–	9%	2%	6%	11%	12%	9%	–	–	12%
	Feb 25, 2020	Tenth Democratic primary debate
Monmouth University	Feb 23–25, 2020	454 (LV)	± 4.6%	36%	–	6%	1%	4%	16%	15%	8%	–	0%	15%
Clemson University	Feb 17–25, 2020	650 (LV)	± 3.8%	35%	–	8%	2%	4%	13%	17%	8%	–	–	12%
East Carolina University	Feb 23–24, 2020	1,142 (LV)	± 3.37%	31%	–	6%	2%	2%	23%	20%	8%	–	–	8%
Public Policy Polling	Feb 23–24, 2020	866 (LV)	± 3.3%	36%	–	7%	6%	3%	21%	7%	8%	–	–	11%
	Feb 22, 2020	Nevada caucuses
YouGov/CBS News	Feb 20–22, 2020	1,238 (LV)	± 5.5%	28%	–	10%	1%	4%	23%	18%	12%	–	3%	1%
Marist Poll/NBC News	Feb 18–21, 2020	539 (LV)	± 6.0%	27%	–	9%	3%	5%	23%	15%	8%	–	2%	9%
		997 (RV)	± 4.0%	25%	–	9%	3%	5%	24%	15%	8%	–	2%	9%
Winthrop University	Feb 9–19, 2020	443 (LV)	± 4.7%	24%	–	7%	1%	4%	19%	15%	6%	1%	2%	22%
University of Massachusetts Lowell	Feb 12–18, 2020	400 (LV)	± 7.5%	23%	–	11%	4%	9%	21%	13%	11%	–	4%	4%
Change Research/The Welcome Party	Feb 12–14, 2020	1015 (LV)	–	23%	–	15%	1%	8%	23%	20%	9%	–	–	1%
East Carolina University	Feb 12–13, 2020	703 (LV)	± 4.3%	28%	6%	8%	1%	7%	20%	14%	7%	–	0%	8%
	Feb 11–12, 2020	New Hampshire primary; Yang withdraws from the race.
	Feb 3, 2020	Iowa caucus
Zogby Analytics	Jan 31 – Feb 3, 2020	277 (LV)	± 5.9%	28%	4%	7%	4%	2%	20%	15%	11%	1%	0%	8%
East Carolina University	Jan 31 – Feb 2, 2020	469 (LV)	± 5.3%	37%	1%	4%	2%	2%	14%	19%	8%	3%	0%	10%
Change Research/ Post and Courier	Jan 26–29, 2020	651 (LV)	± 4%	25%	–	7%	3%	2%	20%	18%	11%	3%	1%	10%
	Jan 13, 2020	Booker withdraws from the race
GQR Research/Unite the Country	Jan 9–13, 2020	600 (LV)	–	36%	–	5%	–	–	15%	12%	10%	–	–	–
Fox News	Jan 5–8, 2020	808 (RV)	± 3.5%	36%	2%	4%	1%	1%	14%	15%	10%	2%	3%	11%

Polling before January 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Kamala Harris	Beto O'Rourke	Bernie Sanders	Tom Steyer	Elizabeth Warren	Other	Undecided
Change Research/ Post and Courier	Dec 6–11, 2019	392 (LV)	± 4.9%	27%	5%	9%	–	–	20%	5%	19%	13%	–
	Dec 3, 2019	Harris withdraws from the race
YouGov/FairVote [8]	Nov 22 – Dec 2, 2019	400 (LV)	± 7.5%	39%	2%	10%	2%	–	13%	7%	10%	13%	4%
Quinnipiac University	Nov 13–17, 2019	768 (LV)	± 4.8%	33%	2%	6%	3%	–	11%	5%	13%	7%	18%
YouGov/CBS News	Nov 6–13, 2019	933 (RV)	± 4.2%	45%	2%	8%	5%	–	15%	2%	17%	6%	–
University of North Florida	Nov 5–13, 2019	426 (LV)	–	36%	2%	3%	4%	–	10%	8%	10%	6%	23%
	Nov 1, 2019	O'Rourke withdraws from the race
Monmouth University	Oct 16–21, 2019	402 (LV)	± 4.9%	33%	2%	3%	6%	1%	12%	4%	16%	7%	15%
Change Research/ Post and Courier	Oct 15–21, 2019	731 (LV)	± 3.6%	30%	3%	9%	11%	1%	13%	5%	19%	11%	–
Firehouse Strategies/ Øptimus	Oct 8–10, 2019	607 (LV)	± 3.7%	32%	2%	4%	5%	1%	8%	–	16%	33%	–
YouGov/CBS News	Oct 3–11, 2019	915 (RV)	±3.9%	43%	3%	4%	7%	1%	16%	2%	18%	6%	–
Gravis Marketing	Oct 3–7, 2019	516 (LV)	± 4.3%	34%	6%	0%	4%	2%	10%	7%	9%	10%	19%
Fox News	Sep 29 – Oct 2, 2019	803 (LV)	± 3.5%	41%	3%	2%	4%	0%	10%	4%	12%	8%	16%
Winthrop University	Sep 21–30, 2019	462 (RV)	± 4.9%	37%	3%	4%	7%	2%	8%	2%	17%	6%	12%
CNN/SSRS	Sep 22–26, 2019	406 (LV)	± 5.9%	37%	2%	4%	3%	2%	11%	3%	16%	4%	10%
YouGov/CBS News	Aug 28 – Sep 4, 2019	849 (RV)	± 4.3%	43%	2%	4%	7%	1%	18%	1%	14%	9%	–
Change Research	Aug 9–12, 2019	521 (LV)	± 4.3%	36%	4%	5%	12%	1%	16%	1%	17%	7%	–
Firehouse Strategies/ Øptimus	Jul 23–25, 2019	554 (LV)	± 3.8%	31%	2%	4%	10%	0%	9%	–	12%	8%	24%
Monmouth University	Jul 18–22, 2019	405 (LV)	± 4.9%	39%	2%	5%	12%	1%	10%	2%	9%	3%	17%
YouGov/CBS News	Jul 9–18, 2019	997 (RV)	± 3.8%	39%	3%	5%	12%	2%	17%	1%	12%	9%	–
Fox News	Jul 7–10, 2019	701 (LV)	± 3.5%	35%	3%	2%	12%	0%	14%	0%	5%	3%	20%
	Jul 9, 2019	Steyer announces his candidacy
Change Research	Jun 29 – Jul 4, 2019	421 (LV)	–	27%	6%	6%	21%	1%	16%	0%	15%	8%	–
Change Research	Jun 17–20, 2019	308 (LV)	–	39%	5%	11%	9%	5%	13%	0%	15%	5%	–
Change Research	Jun 11–14, 2019	933 (LV)	± 3.2%	37%	5%	11%	9%	4%	9%	–	17%	8%	–
YouGov/CBS News	May 31 – Jun 12, 2019	552 (LV)	–	45%	4%	6%	7%	4%	18%	–	8%	8%	–
Zogby Analytics	May 23–29, 2019	183 (LV)	± 7.2%	36%	4%	7%	4%	2%	13%	–	12%	4%	–
Tel Opinion Research*	May 22–24, 2019	600 (LV)	± 4.0%	37%	2%	3%	7%	–	10%	–	8%	–	32%
Crantford Research	May 14–16, 2019	381 (LV)	± 5.0%	42%	4%	8%	10%	–	7%	–	8%	–	–
Change Research	May 6–9, 2019	595 (LV)	± 4.0%	46%	4%	8%	10%	2%	15%	–	8%	5%	–
Firehouse Strategies/ Øptimus	Apr 30 – May 2, 2019	568 (LV)	± 4.5%	48%	4%	5%	4%	1%	12%	–	5%	1%	20%
	Apr 25, 2019	Biden announces his candidacy
	Apr 14, 2019	Buttigieg announces his candidacy
Change Research	Mar 31 – Apr 4, 2019	744 (LV)	± 3.6%	32%	9%	7%	10%	9%	14%	–	6%	12%	–
				–	12%	12%	15%	16%	24%	–	11%	12%	–
	Mar 14, 2019	O'Rourke announces his candidacy
Emerson College	Feb 28 – Mar 2, 2019	291 (LV)	± 5.7%	37%	6%	0%	9%	5%	21%	–	5%	16%	–
Change Research	Feb 15–18, 2019	600 (LV)	± 4.0%	36%	10%	–	13%	8%	14%	–	9%	12%	–
				–	28%	1%	35%	–	–	–	20%	18%	–
	Feb 19, 2019	Sanders announces his candidacy
	Feb 9, 2019	Warren announces her candidacy
Firehouse Strategies/ Øptimus	Jan 31 – Feb 2, 2019	557 (LV)	± 4.0%	36%	5%	–	12%	2%	8%	–	4%	2%	31%

Head-to-head polling
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Pete Buttigieg	Bernie Sanders	Elizabeth Warren	Other	Undecided
YouGov/FairVote[9]	Nov 22 – Dec 2, 2019	400 (LV)	± 7.5%	73%	27%	–	–	–	–
				66%	–	34%	–	–	–
				61%	–	–	29%		6%
				–	39%	61%	–	–	–
				–	36%	–	64%	–	–
				–	–	54%	46%	–	–
Tel Opinion Research	May 22–24, 2019	600	± 4.0%	71%	10%	–	–	–	19%
				70%	–	15%	–	–	16%
				67%	–	–	15%	–	18%

Alabama primary

The Alabama Democratic primary was held on March 3, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided
270 to Win	March 3, 2020	February 28 – March 2, 2020	44.5%	21.0%	18.0%	11.0%	1.0%	4.5%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 2, 2020	40.2%	18.4%	15.9%	10.9%	0.5%	14.1%
Average			42.35%	19.7%	16.95%	10.95%	0.75%	9.3%
Alabama primary results (March 3, 2020)			63.3%	16.5%	11.7%	5.7%	0.2%	2.6%

Tabulation of individual polls of the 2020 Alabama Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
Swayable	Mar 1–2, 2020	949 (LV)	± 5.0%	42%	18%	–	3%	–	–	20%	10%	8%	–
Data for Progress	Feb 28 – Mar 2, 2020	237 (LV)	± 6.4%	47%	18%	–	–	–	–	22%	12%	2%	–
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
	Nov 1, 2019	O'Rourke withdraws from the race
SurveyMonkey	July 2–16, 2019	257	± 7.8%	36%	–	2%	5%	13%	1%	15%	9%	10%	–
Change Research	March 20–23, 2019	1,200	± 2.8%	42%	–	9%	3%	12%	10%	13%	6%	4%	–
				–	–	14%	4%	16%	17%	27%	12%	9%	–

Arkansas primary

The Arkansas Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Michael Bloomberg	Bernie Sanders	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided
270 to Win	March 3, 2020	February 6–March 2, 2020	27.7%	22.3%	18.7%	11.3%	0.5%	19.5%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 2, 2020	27.5%	21.0%	18.1%	12.5%	0.3%	20.6%
Average			27.6%	21.65%	18.4%	11.9%	0.4%	20.05%
Arkansas primary results (March 3, 2020)			40.5%	16.7%	22.4%	10.0%	0.7%	9.7%

Tabulation of individual polls of the 2020 Arkansas Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
Swayable	Mar 1–2, 2020	714 (LV)	± 6.0%	28%	25%	8%	17%	10%	13%	–
Data for Progress	Feb 28–Mar 2, 2020	300 (LV)	± 5.6%	36%	22%	2%	23%	15%	2%	–
The Progress Campaign (D)[10]	Feb 21–25, 2020	209 (RV)	± 4.9%	17%	17%	18%	19%	12%	6%	10%
Hendrix College/Talk Business & Politics	February 6–7, 2020	496 (LV)	± 4.3%	18.5%	19.6%	15.5%	16.4%	8.9%	10.1%	11%

California primary

The California Democratic primary was held on March 3, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Elizabeth Warren	Michael Bloomberg	Tulsi Gabbard	Other/ Undecided
270 to Win	March 3, 2020	February 20 – March 1, 2020	33.0%	20.0%	14.4%	15.0%	1.2%	16.4%
RealClear Politics	March 3, 2020	February 28 – March 2, 2020	35.0%	23.0%	16.0%	14.0%	1.5%	10.5%
FiveThirtyEight	March 3, 2020	until March 2, 2020	31.2%	21.7%	14.9%	14.7%	0.7%	16.8%
Average			33.1%	21.6%	15.1%	14.6%	1.1%	14.5%
California primary results (March 3, 2020)			36.0%	27.9%	13.2%	12.1%	0.6%	10.2%

Polling from January 1 to March 3, 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Amy Klobuchar	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
	March 2, 2020	Klobuchar withdraws from the race.
Swayable	March 1–2, 2020	3,388 (LV)	± 2.0%	20.8%	19.3%	8.4%	3.3%	28.7%	4.0%	9.6%	–	6.0%	–
Data for Progress	February 28 – March 2, 2020	516 (LV)	± 4.3%	25%	17%	5%	3%	32%	–	16%	–	1%	–
AtlasIntel	February 24 – March 2, 2020	727 (LV)	± 4.0%	26%	15%	3%	1%	34%	–	15%	–	2%	4%
	March 1, 2020	Buttigieg withdraws from the race.
Point Blank Political	February 29 – March 1, 2020	1,220 (LV)	± 4.1%	22%	10%	6%	3%	34%	1%	14%	–	1%	9%
Emerson College/Nexstar	February 29 – March 1, 2020	545 (LV)	± 4.1%	21%	11%	7%	5%	38%	2%	16%	–	1%	–
	February 29, 2020	South Carolina primary; Steyer withdraws from the race after close of polls.
YouGov/CBS News	February 27–29, 2020	1,411 (LV)	± 4.0%	19%	12%	9%	4%	31%	3%	18%	–	4%	–
Suffolk University	February 26–29, 2020	500 (LV)	± 4.4%	14%	16%	7%	5%	35%	3%	12%	–	3%	–
YouGov/Hoover Institution/Stanford University	February 26–28, 2020	1,020 (LV)	–	19%	13%	9%	6%	28%	4%	18%	–	3%	–
Point Blank Political	February 26–28, 2020	2,276 (LV)	± 2.9%	14%	12%	9%	3%	34%	3%	14%	–	1%	10%
				40%	–	–	–	50%	–	–	–	–	11%
				–	32%	–	–	57%	–	–	–	–	11%
				–	–	–	–	46%	–	36%	–	–	16%
CNN/SSRS	February 22–26, 2020	488 (LV)	± 5.2%	13%	12%	7%	6%	35%	3%	14%	–	3%	8%
	February 25, 2020	Tenth Democratic primary debate
Point Blank Political	February 23–25, 2020	2,098 (LV)	± 3.0%	11%	11%	9%	4%	34%	3%	13%	–	2%	13%
Berkeley IGS/LA Times	Feb 20–25, 2020	3,002 (LV)	± 2.0%	8%	12%	11%	6%	34%	2%	17%	1%	2%	7%
	February 22, 2020	Nevada caucuses
Change Research/KQED News	February 20–23, 2020	1,069 (LV)	± 3.4%	12%	6%	11%	5%	37%	3%	20%	4%	3%	–
University of Massachusetts Lowell	February 12–20, 2020	450 (LV)	± 6.7%	13%	12%	12%	7%	24%	2%	16%	–	7%	6%
Monmouth University	February 16–19, 2020	408 (LV)	± 4.9%	17%	13%	9%	4%	24%	5%	10%	–	3%	13%
				36%	–	–	–	44%	–	–	–	15%	5%
				–	31%	–	–	48%	–	–	–	14%	6%
				–	–	26%	–	51%	–	–	–	16%	7%
				–	–	–	24%	54%	–	–	–	16%	6%
Public Policy Institute of California	February 7–17, 2020	573 (LV)	± 5.7%	14%	12%	12%	5%	32%	3%	13%	–	2%	8%
SurveyUSA	February 13–16, 2020	520 (LV)	± 4.8%	15%	21%	12%	6%	25%	3%	9%	–	1%	9%
YouGov/USC	February 1–15, 2020	–	–	21%	8%	6%	3%	29%	2%	20%	–	2%	9%
	February 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls.
Capitol Weekly	February 6–9, 2020	843 (LV)	–	8%	8%	15%	7%	25%	4%	19%	5%	6%	3%
				11%	13%	14%	5%	29%	3%	16%	4%	5%	1%
	February 3, 2020	Iowa Caucuses
Change Research/KQED News	January 25–27, 2020	1,967 (LV)	–	15%	4%	8%	3%	30%	2%	16%	5%	4%	13%
Berkeley IGS/LA Times	January 15–21, 2020	2,895 (LV)	± 2.5%	15.0%	6.0%	7.2%	4.9%	26.3%	1.8%	19.6%	3.9%	3.6%	11.7%
SurveyUSA	January 14–16, 2020	565 (LV)	± 5.1%	30%	6%	8%	2%	20%	4%	20%	4%	2%	4%
	January 13, 2020	Booker withdraws from the race.
Public Policy Institute of California/Mercury News	January 3–12, 2020	530 (LV)	± 6.5%	24%	1%	6%	4%	27%	–	23%	3%	5%	7%
Tulchin Research/USC Rossier/The Hill	January 3–10, 2020	1,121 (LV)	–	25%	7%	8%	2%	29%	3%	12%	5%	2%	6%
Capitol Weekly	January 1–9, 2020	1,053 (LV)	–	20%	6%	11%	5%	24%	2%	21%	7%	3%	–

Polling before 1 January 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Kamala Harris	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
Change Research/KQED News	December 6–10, 2019	862 (LV)	± 3.3%	19%	3%	12%	–	–	26%	23%	4%	13%	–
CNN/SSRS	December 4–8, 2019	508 (LV)	± 5.2%	21%	3%	9%	–	–	20%	17%	6%	12%	11%
Capitol Weekly	December 3–7, 2019	581 (LV)	–	19%	2%	14%	–	–	19%	23%	5%	17%	1%
				19%	2%	13%	4%	–	19%	21%	5%	17%	0%
	December 3, 2019	Harris withdraws from the race.
Berkeley IGS/LA Times	November 21–27, 2019	1,252 (LV)	–	14%	1%	12%	7%	–	24%	22%	3%	12%	9%
SurveyUSA	November 20–22, 2019	558 (LV)	± 4.8%	28%	3%	8%	10%	–	18%	13%	5%	11%	5%
Capitol Weekly	November 1–12, 2019	695 (LV)	–	18%	1%	14%	6%	–	21%	27%	4%	8%	1%
[[Public Policy Institute of California]]	November 3–12, 2019	682 (LV)	–	24%	1%	7%	8%	–	17%	23%	5%	6%	9%
	November 1, 2019	O'Rourke withdraws from the race.
Change Research	October 15–18, 2019	1,631 (LV)	–	19%	1%	9%	8%	1%	24%	28%	3%	6%	–
SurveyUSA	October 15–16, 2019	553 (LV)	± 6.9%	33%	2%	4%	8%	2%	17%	18%	4%	5%	8%
Capitol Weekly	October 1–14, 2019	590 (LV)	–	21%	2%	6%	8%	0%	15%	35%	3%	9%	–
[[Public Policy Institute of California]]	September 16–25, 2019	692 (LV)	± 4.9%	22%	2%	6%	8%	1%	21%	23%	3%	7%	9%
Berkeley IGS/LA Times	September 13–18, 2019	2,272	–	20%	1%	6%	8%	3%	19%	29%	2%	5%	8%
Emerson College	September 13–16, 2019	424	± 4.7%	26%	1%	4%	6%	5%	26%	20%	7%	4%	–
SurveyUSA	September 13–15, 2019	547	± 4.8%	27%	2%	3%	13%	2%	18%	16%	7%	4%	7%
Change Research/KQED	September 12–15, 2019	3,325	± 1.7%	18%	2%	10%	11%	2%	23%	25%	3%	5%	–
Capitol Weekly	September 1–13, 2019	599	–	18%	1%	7%	11%	2%	21%	29%	4%	5%	–
Capitol Weekly	September 1–13, 2019	5,510	–	18%	1%	8%	11%	2%	17%	33%	3%	7%	–
SurveyUSA	August 1–5, 2019	528	± 6.3%	25%	1%	6%	17%	0%	18%	21%	1%	1%	10%
PPIC	July 14–23, 2019	766	± 4.4%	11%	–	5%	19%	–	12%	15%	–	14%	25%
YouGov/CBS News	July 9–18, 2019	1,514	± 2.9%	24%	1%	6%	23%	1%	16%	19%	1%	9%	–
Quinnipiac University	July 10–15, 2019	519	± 5.7%	21%	1%	3%	23%	1%	18%	16%	2%	2%	10%
Capitol Weekly	July 1–15, 2019	816	–	20%	1%	8%	20%	2%	16%	25%	1%	7%	–
Change Research	July 9–11, 2019	1,609	± 2.5%	17%	1%	8%	23%	2%	20%	22%	2%	5%	–
	July 8, 2019	Swalwell withdraws from the race.
Capitol Weekly	June 1–30, 2019	813	–	23%	2%	8%	14%	2%	19%	23%	2%	9%	–
UC Berkeley	June 4–10, 2019	2,131	± 3.0%	22%	1%	10%	13%	3%	17%	18%	1%	3%	11%
Capitol Weekly	May 1–31, 2019	1,180	–	29%	2%	9%	17%	4%	22%	11%	0%	6%	–
Change Research	May 25–28, 2019	1,649	± 2.4%	30%	1%	12%	15%	3%	23%	12%	1%	2%	–
Capitol Weekly	April 15–30, 2019	1,204	–	20%	2%	19%	17%	4%	20%	10%	–	9%	–
	April 25, 2019	Biden announces his candidacy.
	April 14, 2019	Buttigieg announces his candidacy.
Change Research	April 6–9, 2019	2,003	± 2.2%	21%	3%	9%	19%	10%	22%	8%	1%	7%	–
				–	5%	11%	27%	16%	28%	9%	1%	5%	–
	April 8, 2019	Swalwell announces his candidacy.
Quinnipiac University	April 3–8, 2019	482	± 5.9%	26%	2%	7%	17%	4%	18%	7%	1%	6%	13%
	March 14, 2019	O'Rourke announces his candidacy.
	February 19, 2019	Sanders announces his candidacy.
Change Research	February 9–11, 2019	948	–	26%	3%	1%	26%	8%	20%	7%	0%	7%	–
				–	7%	2%	53%	–	–	23%	1%	15%	–

Colorado primary

The Colorado Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Elizabeth Warren	Michael Bloomberg	Tulsi Gabbard	Un- decided
270 to Win	March 3, 2020	Feb 24–Mar 2, 2020	29.3%	16.3%	16.0%	15.3%	1.0%	22.1%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 3, 2020	26.8%	18.2%	16.3%	15.8%	0.5%	22.4%
Average			28.0%	17.3%	16.2%	15.6%	0.8%	22.1%
Colorado primary results (March 3, 2020)			37.0%	24.6%	17.6%	18.5%	1.0%	1.3%

Tabulation of individual polls of the 2020 Colorado Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Michael Bennet	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	John Hickenlooper	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable	Mar 1–2, 2020	921 (LV)	± 4.0%	–	20%	19%	12%	–	–	29%	12%	–	7%	–
Data for Progress	Feb 28–Mar 2, 2020	464 (LV)	± 4.2%	–	18%	16%	8%	–	–	32%	21%	–	5%	–
	Mar 1, 2020	Buttigieg withdraws from the race
Elucd	Feb 26–Mar 1, 2020	561 (LV)	± 4.1%	–	10%	9%	10%	–	–	34%	14%	–	9%	14%
Magellan Strategies	Feb 24–25, 2020	500 (LV)	± 4.38%	–	11%	11%	12%	–	–	27%	15%	–	9%	15%
Data for Progress	Feb 23–25, 2020	471 (LV)	± 4.7%	–	10%	14%	14%	–	–	34%	20%	–	7%	1%
	Feb 11, 2020	New Hampshire primary; Yang and Bennet withdraw from the race
	Dec 3, 2019	Harris withdraws from the race
Emerson College	Aug 16–19, 2019	403 (LV)	± 4.8%	1%	25%	–	5%	13%	–	26%	20%	4%	8%	–
	Aug 15, 2019	Hickenlooper withdraws from the race
Public Policy Polling	Jul 12–14, 2019	519 (LV)	–	5%	22%	–	7%	9%	7%	15%	19%	0%	14%	–

Maine primary

The Maine Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Undecided
270 to Win	Mar 3, 2020	Feb 10–Mar 2, 2020	28.7%	19.7%	20.0%	13.3%	1.3%	17.0%
RealClear Politics	Mar 3, 2020	Feb 28–Mar 2, 2020	38.5%	24.5%	14.0%	18.0%	–	5.0%
FiveThirtyEight	Mar 3, 2020	until Mar 2, 2020	31.1%	21.7%	17.2%	14.2%	0.7%	19.6%
Average			32.8%	22.0%	17.1%	15.2%	1.0%	11.9%
Maine primary results (March 3, 2020)			32.4%	33.4%	11.8%	15.6%	0.9%	5.9%

Tabulation of individual polls of the 2020 Maine Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable	Mar 1–2, 2020	209 (LV)	± 9.0%	22%	28%	10%	–	27%	11%	–	3%	–
Change Research	Mar 1–2, 2020	507 (LV)	–	24%	10%	–	–	43%	16%	–	7%	–
Data for Progress	Feb 28–Mar 2, 2020	385 (LV)	± 4.9%	25%	18%	1%	–	34%	20%	–	2%	–
	Mar 1, 2020	Buttigieg withdraws from the race
SocialSphere/Colby College	Feb 10–13, 2020	350 (LV)	–	12%	14%	16%	–	25%	9%	2%	10%	12%
	Feb 11, 2020	Yang withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
Maine People's Resource Center	Oct 14–21, 2019	728 (LV)	± 3.63%	26.8%	–	9.1%	5.0%	15.4%	22.1%	1.7%	11.4%	4.4%
Public Policy Polling	Oct 11–13, 2019	366 (LV)	± 5.1%	19%	–	9%	4%	12%	31%	3%	20%	–
Gravis Marketing	Jun 24, 2019	243	± 6.3%	25%	–	8%	2%	15%	17%	5%	15%	11%

Massachusetts primary

The Massachusetts Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Elizabeth Warren	Joe Biden	Michael Bloomberg	Tulsi Gabbard	Others/ Undecided
270 to Win	March 3, 2020	Until March 3, 2020	22.4%	21.0%	15.0%	13.6%	1.8%	26.2%
FiveThirtyEight	March 3, 2020	until March 3, 2020	24.4%	21.0%	18.1%	14.5%	0.4%	21.6%
Average			23.4%	21.0%	16.6%	14.0%	1.1%	23.9%
Massachusetts primary results (March 3, 2020)			26.6%	21.4%	33.4%	11.7%	0.7%	6.1%

Tabulation of individual polls of the 2020 Massachusetts Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Deval Patrick	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race; endorses Biden
Swayable	Mar 1–2, 2020	917 (LV)	± 4.0%	17%	18%	–	11%	–	5%	–	–	27%	15%	8%	–
Data for Progress	Feb 28–Mar 2, 2020	301 (LV)	± 5.6%	26%	15%	–	2%	–	1%	–	–	26%	28%	2%	–
	Mar 1, 2020	Buttigieg withdraws from the race; endorses Biden
Suffolk University/Boston Globe/WBZ-TV	Feb 26–29, 2020	500 (LV)	-	11.0%	13.0%	–	12.4%	–	5.0%	–	–	24.2%	22.2%	3.6%	8.6%
WBUR/MassINC	Feb 23–26, 2020	426 (LV)	± 4.9%	9%	13%	-	14%	-	6%	-	-	25%	17%	9%	8%
UMass Amherst	Feb 18–24, 2020	400 (LV)	± 5.9%	12%	9%	-	14%	-	7%	-	-	25%	23%	8%	3%
Falchuk & DiNatale	Feb 16–18, 2020	453 (LV)	–	13%	13%	–	13%	–	14%	–	–	17%	16%	5%	8%
University of Massachusetts Lowell	Feb 12–19, 2020	450 (LV)	± 6.1%	14%	12%	–	15%	–	9%	–	–	21%	20%	6%	4%
	Feb 12, 2020	Patrick withdraws from the race
Falchuk & DiNatale	Jan 27–30, 2020	334 (LV)	–	16%	8%	–	6%	–	7%	–	3%	12%	23%	7%	–
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
	Nov 14, 2019	Patrick announces his candidacy
	Nov 1, 2019	O'Rourke withdraws from the race
WBUR	Oct 16–20, 2019	456	± 4.6%	18%	–	0%	7%	3%	1%	0%	–	13%	33%	7%	15%
Suffolk University	Sep 3–5, 2019	500	-	26%	–	1%	5%	3%	0%	1%	–	8%	24%	6%	25%
	Aug 23, 2019	Moulton withdraws from the race
Suffolk University	Jun 5–9, 2019	370	± 5.1%	22%	–	1%	8%	5%	0%	1%	–	6%	10%	5%	42%
	Apr 25, 2019	Biden announces his candidacy
	Apr 22, 2019	Moulton announces his candidacy
	Apr 14, 2019	Buttigieg announces his candidacy
Emerson College	Apr 4–7, 2019	371	± 5.0%	23%	–	2%	11%	7%	2%	8%	–	26%	14%	8%	–
	Mar 14, 2019	O'Rourke announces his candidacy
	Feb 19, 2019	Sanders announces his candidacy
	Feb 10, 2019	Klobuchar announces her candidacy
	Feb 9, 2019	Warren announces her candidacy
	Feb 1, 2019	Booker announces his candidacy
	Jan 21, 2019	Harris announces her candidacy
YouGov/UMass Amherst	Nov 7–14, 2018	655	–	19%	–	3%	–	6%	3%	10%	6%	14%	11%	1%	27%

Hypothetical polling with only Biden, Sanders and Warren
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Bernie Sanders	Elizabeth Warren	Undecided
Evan Falchuk and Lou DiNatalie/Commonwealth Magazine	Oct 23–25, 2019	443 (LV)	–	35%	13%	41%	11%

Minnesota primary

The Minnesota Democratic primary was held on March 3, 2020. Amy Klobuchar led in pre-election polling, but withdrew from the race the night before the election and endorsed Joe Biden (who went on to win Minnesota).

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Joe Biden	Michael Bloomberg	Tulsi Gabbard	Un- decided
270 to Win	Mar 2, 2020	Feb 20–22, 2020	28.0%	22.0%	13.5%	8.5%	6.0%	2.5%	19.5%
FiveThirtyEight	Mar 2, 2020	until Mar 2, 2020	24.4%	26.2%	14.4%	10.7%	5.6%	1.5%	17.2%
Average			26.2%	24.1%	14.0%	9.6%	5.8%	2.0%	18.3%
Minnesota Primary results (March 3, 2020)			5.6%	29.9%	15.4%	38.6%	8.3%	0.3%	1.8%

Tabulation of individual polls of the 2020 Minnesota Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable	Mar 1–2, 2020	1,472 (LV)	± 4.0%	20%	14%	4%	–	21%	–	27%	8%	6%	–
Data for Progress	Feb 28–Mar 2, 2020	650 (LV)	± 3.84%	27%	16%	–	–	2%	–	32%	21%	1%	–
	Mar 1, 2020	Buttigieg withdraws from the race
Mason-Dixon/Star Tribune/ MPR News Minnesota	Feb 17–20, 2020	500(LV)	± 4.5%	8%	3%	3%	–	29%	–	23%	11%	2%	21%
University of Massachusetts Lowell	Feb 12–19, 2020	450(LV)	± 6.4%	9%	9%	10%	–	27%	–	21%	16%	4%	4%
	Dec 3, 2019	Harris withdraws from the race
	Nov 1, 2019	O'Rourke withdraws from the race
St. Cloud State University	Oct 14-Nov 1, 2019	177 (LV)	–	15%	–	2%	–	15%	–	12%	15%	–	–
Kaiser Family Foundation	Sep 23–Oct 15, 2019	249	–	14%	–	7%	1%	15%	1%	13%	25%	5%	21%
Change Research	Jun 8–12, 2019	772	± 3.7%	20%	–	11%	4%	16%	3%	19%	21%	5%	–

North Carolina primary

The North Carolina Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date Updated	Dates polled	Joe Biden	Bernie Sanders	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided
270 to Win	March 3, 2020	February 21–March 2, 2020	27.8%	25.8%	17.0%	11.6%	0.8%	17.0%
RealClear Politics	March 3, 2020	February 27–March 2, 2020	36.7%	23.3%	14.3%	10.7%	1.0%	14.0%
FiveThirtyEight	March 3, 2020	until March 2, 2020	34.5%	22.1%	14.4%	11.3%	0.2%	17.5%
Average			33.0%	23.7%	15.2%	11.2%	0.7%	16.2%
North Carolina primary results (March 3, 2020)			43.0%	24.1%	13.0%	10.5%	0.5%	8.9%

Tabulation of individual polls of the 2020 North Carolina Democratic primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Spry Strategies/Civitas	Mar 1–2, 2020	543 (LV)	± 4.2%	45%	11%	–	3%	–	18%	7%	–	6%	11%
Swayable	Mar 1–2, 2020	1,209 (LV)	± 3.0%	36%	18%	–	4%	–	23%	10%	–	10%	–
Data for Progress	Feb 28–Mar 2, 2020	334 (LV)	± 5.3%	36%	18%	–	3%	–	27%	14%	–	3%	–
	Mar 1, 2020	Buttigieg withdraws from the race
Elucd	Feb 26–Mar 1, 2020	657 (LV)	± 3.8%	25%	15%	–	6%	–	26%	12%	–	6%	10%
East Carolina University	Feb 27–28, 2020	499 (LV)	± 5.1%	29%	14%	–	4%	–	25%	11%	–	9%	9%
High Point University	Feb 21–28, 2020	274 (LV)	–	14%	20%	–	8%	–	28%	12%	–	13%	7%
		472 (RV)	–	14%	18%	–	8%	–	31%	11%	–	11%	7%
Spry Strategies/Civitas	Feb 26–27, 2020	581 (LV)	± 4.1%	27%	16%	–	4%	–	19%	11%	–	10%	15%
Marist College	Feb 23–27, 2020	568 (LV)	± 5.1%	24%	15%	–	7%	–	26%	11%	–	8%	7%
		974 (RV)	± 3.9%	22%	15%	–	7%	–	27%	11%	–	9%	8%
Data for Progress	Feb 23–27, 2020	536 (LV)	± 4.2%	25%	18%	–	10%	–	27%	11%	–	8%	–
Public Policy Polling	Feb 23–24, 2020	852 (LV)	± 3.4%	23%	17%	–	9%	–	20%	11%	–	8%	11%
Meredith College	Feb 16–24, 2020	430 (LV)	–	17.9%	17.0%	0.7%	10.0%	–	19.5%	10.9%	–	7.6%	16.5%
Spry Strategies/Civitas	Feb 21–23, 2020	561 (LV)	± 3.75%	20%	20%	–	3%	–	20%	9%	–	13%	14%
University of Massachusetts Lowell	Feb 12–18, 2020	450 (LV)	± 6.5%	16%	19%	–	10%	–	23%	13%	–	13%	6%
SurveyUSA/WRAL News	Feb 13–16, 2020	698 (LV)	± 5.0%	20%	22%	–	11%	–	22%	8%	–	7%	11%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
High Point University	Jan 31–Feb 6, 2020	225 (LV)	–	24%	16%	0%	8%	–	20%	11%	3%	9%	8%
		399 (RV)	–	19%	13%	1%	6%	–	25%	12%	4%	8%	12%
Public Policy Polling	Feb 4–5, 2020	604 (LV)	–	25%	14%	–	9%	–	16%	12%	5%	7%	13%
	Jan 13, 2020	Booker withdraws from the race
Public Policy Polling	Jan 10–12, 2020	509 (LV)	–	31%	8%	1%	6%	–	18%	15%	5%	6%	11%
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg launches his campaign
Fox News	Nov 10–13, 2019	669	± 3.5%	37%	–	2%	6%	4%	14%	15%	2%	8%	10%
HighPoint University	Nov 1–7, 2019	347	± 6.4%	33%	–	2%	4%	5%	18%	13%	2%	6%	10%
		1,049	± 3.6%	18%	–	2%	4%	4%	15%	7%	2%	7%	23%
Siena Research/New York Times	Oct 13–26, 2019	324	–	29%	–	1%	1%	1%	13%	15%	0%	3%	32%
High Point University	Sep 13–19, 2019	348 (A)	–	31%	–	4%	3%	6%	20%	15%	4%	3%	9%
SurveyUSA/Civitas	Aug 1–5, 2019	534	± 6.1%	36%	–	1%	5%	8%	15%	13%	1%	2%	17%
Emerson College	May 31 – Jun 3, 2019	397	± 4.9%	39%	–	1%	8%	5%	22%	15%	1%	7%	–

Oklahoma primary

The Oklahoma Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided
270 to Win	March 3, 2020	February 17–March 2, 2020	28.0%	23.7%	16.0%	12.3%	1.5%	18.5%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 2, 2020	30.6%	22.1%	13.7%	13.6%	1.1%	18.9%
Average			29.3%	22.9%	14.85%	12.95%	1.3%	18.7%
Oklahoma primary results (March 3, 2020)			38.7%	25.4%	13.9%	13.4%	1.7%	6.9%

Tabulation of individual polls of the 2020 Oklahoma Democratic primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
Swayable	Mar 1–2, 2020	472 (LV)	± 6.0%	38%	11%	1%	–	1%	26%	13%	9%	–
Data for Progress	Feb 28–Mar 2, 2020	300 (LV)	± 5.5%	35%	19%	–	–	–	28%	16%	2%	–
SoonerPoll	Feb 17–21, 2020	409	4.84%	21%	20%	10%	–	7%	13%	9%	2%	19%
Cole Hargrave Snodgrass & Associated	Feb 10–13, 2020	172 (LV)	–	12%	20%	1%	–	6%	14%	8%	21%	9%
	Dec 3, 2019	Harris withdraws from the race
SoonerPoll	Jul 17–27, 2019	152	–	26%	–	6%	8%	1%	5%	12%	11%	34%

Tennessee primary

The Tennessee Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided
270 to Win	March 3, 2020	February 28–March 2, 2020	31.0%	27.0%	18.5%	12.0%	0.5%	11.0%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 2, 2020	29.0%	24.7%	15.7%	12.3%	0.2%	18.1%
Average			30.0%	25.85%	17.1%	12.15%	0.35%	14.55%
Tennessee primary results (March 3, 2020)			41.7%	25.0%	15.5%	10.4%	0.4%	7.0%

Tabulation of individual polls of the 2020 Tennessee Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
Swayable	Mar 1–2, 2020	1,527 (LV)	± 4.0%	28%	17%	8%	–	27%	9%	11%	–
Data for Progress	Feb 28–Mar 2, 2020	368 (LV)	± 5.1%	34%	20%	2%	–	27%	15%	3%	–
	Dec 3, 2019	Harris withdraws from the race
SurveyMonkey	Jul 2–16, 2019	128	± 11.2%	33%	–	6%	12%	13%	18%	11%	–

Texas primary

The Texas Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided
270 to Win	Mar 2, 2020	Feb 17-Mar 1, 2020	30.2%	25.6%	16.8%	13.6%	1.0%	12.8%
RealClear Politics	Mar 2, 2020	Feb 27-Mar 1, 2020	29.5%	28.0%	18.0%	14.5%	2.0%	8.0%
FiveThirtyEight	March 3, 2020	until March 2, 2020	28.2%	25.5%	16.5%	13.3%	0.4%	16.1%
Average			29.0%	26.5%	17.1%	13.8%	0.9%	12.6%
Texas primary results (March 3, 2020)			30.0%	34.5%	14.4%	11.4%	0.4%	9.3%

Polling from January 1, 2020, to March 3, 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable	Mar 1–2, 2020	1,378 (LV)	± 3.0%	27%	20%	5%	3%	28%	12%	–	6%	–
Data for Progress	Feb 28–Mar 2, 2020	300 (LV)	± 5.7%	30%	20%	4%	3%	28%	15%	–	1%	–
AtlasIntel	Feb 24-Mar 2, 2020	486 (LV)	± 4.0%	25%	16%	5%	3%	35%	9%	–	3%	4%
	Mar 1, 2020	Buttigieg withdraws from the race
Emerson College/Nexstar	Feb 29-Mar 1, 2020	450 (LV)	± 4.6%	26%	16%	5%	4%	31%	14%	–	5%	–
Elucd	Feb 26-Mar 1, 2020	833 (LV)	± 3.4%	20%	14%	7%	5%	31%	13%	–	–	11%
YouGov/CBS News	Feb 27–29, 2020	635 (LV)	± 6.2%	26%	13%	6%	6%	30%	17%	–	2%	–
Marist College	Feb 23–27, 2020	556 (LV)	± 5.3%	19%	15%	8%	3%	34%	10%	–	2%	9%
		1,050 (RV)	± 3.7%	18%	16%	8%	3%	35%	8%	–	3%	9%
Data for Progress	Feb 23–27, 2020	513 (LV)	± 4.3%	21%	21%	9%	5%	30%	13%	–	2%	–
CNN/SSRS	Feb 22–26, 2020	387 (LV)	± 6.0%	20%	18%	8%	3%	29%	15%	–	0%	5%
Latino Decisions/Univision/ University of Houston	Feb 21–26, 2020	527 (LV)	± 4.3%	20%	20%	6%	2%	26%	11%	–	7%	6%
University of Texas at Tyler	Feb 17–26, 2020	586 (LV)	± 4.1%	19%	21%	8%	4%	29%	10%	–	2%	5%
Public Policy Polling/Progress Texas	Feb 24–25, 2020	1,045 (LV)	± 3.0%	31%	–	11%	7%	25%	17%	–	4%	5%
				24%	17%	10%	4%	24%	14%	–	2%	5%
	Feb 22, 2020	Nevada caucuses
University of Massachusetts Lowell	Feb 12–18, 2020	600 (LV)	± 5.9%	20%	18%	7%	9%	23%	14%	–	6%	3%
YouGov/University of Houston	Feb 6–18, 2020	1,352 (LV)	± 2.7%	20%	12%	11%	7%	20%	17%	–	8%	5%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race
YouGov/University of Texas/Texas Tribune	Jan 31-Feb 9, 2020	575 (LV)	± 4.09%	22%	10%	7%	3%	24%	15%	6%	13%	–
University of Texas At Tyler/Dallas News	Jan 21–30, 2020	372 (LV)	± 4.8%	34%	16%	4%	3%	18%	17%	3%	5%	–
Data for Progress[11]	Jan 16–21, 2020	615 (LV)	± 6.5%	26%	7%	10%	4%	20%	14%	3%	3%	12%
Texas Lyceum	Jan 10–19, 2020	401 (LV)	± 4.89%	28%	9%	6%	4%	26%	13%	0%	5%	7%
	Jan 13, 2020	Booker withdraws from the race
	Jan 2, 2020	Castro withdraws from the race

Polling before January 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Julian Castro	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
CNN/SSRS	Dec 4–8, 2019	327 (LV)	± 6.6%	35%	2%	9%	3%	–	1%	–	15%	13%	3%	11%	9%
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
University of Texas at Tyler	Nov 5–14, 2019	427 (RV)	± 4.7%	28%	1%	8%	3%	5%	2%	–	18%	19%	2%	4%	–
	Nov 1, 2019	O'Rourke withdraws from the race
University of Texas/ Texas Tribune	Oct 18–27, 2019	541	± 4.2%	23%	1%	6%	2%	5%	2%	14%	12%	18%	4%	4%	5%
University of Texas at Tyler	Sep 13–15, 2019	474 (RV)	± 4.5%	28%	6%	4%	4%	6%	0%	19%	17%	11%	1%	5%	–
Texas Tribune	Aug 29–Sep 15, 2019	550	± 4.2%	26%	1%	4%	3%	5%	1%	14%	12%	18%	3%	4%	6%
Quinnipiac University	Sep 4–9, 2019	456	± 5.5%	28%	1%	3%	3%	5%	2%	12%	12%	18%	1	1%	12%
Univision/University of Houston	Aug 31– Sep 6, 2019	1004 (RV)	± 4.5%	20%	3%	1%	12%	5%	–	19%	13%	12%	1%	4%	10%
Ragnar Research	Sep 3–5, 2019	600	± 3.9%	23%	1%	6%	2%	7%	–	12%	12%	15%	–	7%	18%
Climate Nexus	Aug 20–25, 2019	639	–	24%	2%	3%	3%	7%	–	21%	12%	12%	1%	5%	9%
TEXAS LYCEUM	Aug 16–25, 2019	358	± 5.2%	24%	2%	3%	4%	4%	3%	18%	13%	15%	2%	8%	2%
Emerson College	Aug 1–3, 2019	400	± 4.9%	28%	2%	7%	2%	5%	<1%	19%	16%	14%	3%	5%	–
YouGov/CBS News	Jul 9–18, 2019	910	± 4.2%	27%	0%	4%	4%	12%	1%	17%	12%	16%	1%	6%	–
YouGov/University of Texas	May 31 – Jun 9, 2019	483	± 5.0%	23%	1%	8%	3%	5%	1%	15%	12%	14%	0%	8%	7%
Quinnipiac University	May 29 – Jun 4, 2019	407	± 5.8%	30%	1%	3%	4%	4%	<1%	16%	15%	11%	1%	5%	8%
Change Research	May 30 – Jun 3, 2019	1,218	± 2.8%	24%	1%	8%	2%	8%	1%	27%	13%	12%	1%	2%	–
Emerson College	Apr 25–28, 2019	342	± 5.3%	23%	1%	8%	4%	3%	3%	22%	17%	7%	3%	11%	–
	Apr 25, 2019	Biden announces his candidacy
Change Research	Apr 18–22, 2019	1,578	± 2.5%	20%	2%	15%	4%	5%	1%	25%	19%	5%	1%	2%	–
				–	4%	21%	5%	8%	1%	33%	23%	5%	0%	0%	–

Utah primary

The Utah Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided
270 to Win	March 3, 2020	Feb 22–March 2, 2020	26.3%	21.7%	18.7%	13.3%	1.5%	20.0%
FiveThirtyEight	March 3, 2020	Until March 2, 2020	26.3%	20.0%	18.2%	14.6%	1.3%	20.9%
Average			26.3%	20.9%	18.5%	14.0%	1.4%	20.5%
Utah primary results (March 3, 2020)			36.1%	18.4%	15.4%	16.2%	0.8%	13.0%

Tabulation of individual polls of the 2020 Utah Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable	Mar 1–2, 2020	143 (LV)	± 9.0%	27%	29%	7%	6%	22%	6%	–	2%	–
Data for Progress	Feb 28–Mar 2, 2020	622 (LV)	± 3.9%	23%	17%	7%	3%	29%	19%	–	2%	–
	Mar 1, 2020	Buttigieg withdraws from the race
HarrisX/University of Utah/Deseret News	Feb 22–26, 2020	298 (LV)	± 5.7%	6%	19%	18%	4%	28%	15%	–	1%	8%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race
Salt Lake Tribune/Suffolk	Jan 18–22, 2020	132 (LV)	± 8.5%	12%	10%	5%	3%	27%	14%	5%	4%	21%

Vermont primary

The Vermont Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Elizabeth Warren	Joe Biden	Michael Bloomberg	Tulsi Gabbard	Other/ Undecided
270 to Win	March 3, 2020	February 4–March 2, 2020	52.0%	14.0%	10.7%	10.3%	1.0%	12.0%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 2, 2020	53.0%	14.2%	10.4%	8.9%	0.9%	12.6%
Average			52.5%	14.1%	10.55%	9.6%	0.95%	12.3%
Vermont primary results (March 3, 2020)			50.6%	12.5%	21.9%	9.4%	0.8%	4.8%

Tabulation of individual polls of the 2020 Vermont Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Other	Un- decided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable	Mar 1–2, 2020	147 (LV)	± 11.0%	11%	16%	5%	2%	48%	17%	2%	–
Data for Progress	Feb 28–Mar 2, 2020	236 (LV)	± 6.9%	16%	8%	1%	–	57%	16%	2%	–
	Mar 1, 2020	Buttigieg withdraws from the race
Vermont Public Radio	Feb 4–10, 2020	332 (LV)	± 4.0%	5%	7%	9%	4%	51%	13%	2%	7%

Virginia primary

The Virginia Democratic primary was held on March 3, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates Polled	Joe Biden	Bernie Sanders	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Un- decided
270 to Win	March 3, 2020	Until March 3, 2020	28.8%	20.0%	17.3%	10.3%	0.7%	23.9%
RealClear Politics	March 3, 2020	Until March 3, 2020	44.0%	24.5%	14.0%	15.0%	0.0%	2.5%
FiveThirtyEight	Mar 3, 2020	until Mar 3, 2020	39.9%	21.0%	13.2%	12.3%	0.5%	13.1%
Average			37.6%	21.8%	14.1%	12.5%	0.4%	13.2%
Virginia primary results (March 3, 2020)			53.3%	23.1%	9.7%	10.8%	0.9%	2.2%

Tabulation of individual polls of the 2020 Virginia Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Un- decided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable	Mar 1–2, 2020	1,435 (LV)	± 4.0%	36%	20%	–	4%	–	3%	–	20%	11%	6%	–
AtlasIntel	Mar 1–2, 2020	545 (LV)	± 4.0%	42%	11%	–	1%	–	1%	–	28%	10%	3%	4%
Change Research	Mar 1–2, 2020	510 (LV)	–	45%	10%	–	–	–	4%	–	25%	13%	3%	–
Data for Progress	Feb 28–Mar 2, 2020	327 (LV)	± 5.4%	39%	18%	–	–	–	–	–	24%	17%	1%	–
	Mar 1, 2020	Buttigieg withdraws from the race
Data for Progress	Feb 23 – 25, 2020	499 (LV)	± 4.5%	19%	17%	–	12%	–	5%	–	28%	17%	2%	–
Monmouth University	Feb 13 – 16, 2020	400 (LV)	± 4.9%	18%	22%	–	11%	–	9%	–	22%	5%	1%	11%
				51%	–	–	–	–	–	–	38%	–	4%	7%
				–	47%	–	–	–	–	–	41%	–	5%	7%
				–	–	–	42%	–	–	–	44%	–	7%	7%
				–	–	–	–	–	42%	–	45%	–	6%	7%
Christopher Newport University	Feb 3 – 23, 2020	561 (LV)	± 4.3%	22%	13%	–	8%	–	5%	–	17%	8%	6%	16%
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
	Nov 1, 2019	O'Rourke withdraws from the race
University of Mary Washington	Sep 3 – 15, 2019	882 (RV)	± 3.3%	23%	–	1%	4%	5%	2%	1%	9%	9%	46%	–
Hampton University	May 29 – Jun 6, 2019	1,126 (RV)	± 4.3%	36%	–	2%	11%	7%	<1%	3%	17%	13%	10%	–
Change Research	Apr 26–30, 2019	551 (LV)	± 4.2%	41%	–	3%	12%	5%	1%	4%	20%	10%	5%	–

Idaho primary

The Idaho Democratic primary is scheduled to take place on March 10, 2020.

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Tulsi Gabbard	Bernie Sanders	Other	Undecided
Swayable	Mar 8–9, 2020	833 (LV)	± 7%	52%	2%	37%	9%	–
Data for Progress	Mar 7–9, 2020	329 (LV)	± 5.4%	51%	2%	47%	–	–

Michigan primary

The Michigan Democratic primary is scheduled to take place on March 10, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Other/ Undecided
270 to Win	Mar 10, 2020	Mar 4–9, 2020	57.0%	32.3%	1.3%	9.4%
RealClear Politics	Mar 10, 2020	Mar 4–9, 2020	55.7%	33.3%	1.3%	9.7%
FiveThirtyEight	Mar 10, 2020	until Mar 9, 2020	55.3%	31.9%	1.2%	11.6%
Average			56.0%	32.5%	1.3%	10.2%
Michigan primary results (March 10, 2020)			52.9%	36.4%	0.6%	10.1%

Tabulation of individual polls of the 2020 Michigan Democratic primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
Swayable	Mar 9, 2020	3,126 (LV)	± 3.0%	62%	–	–	–	–	–	–	28%	–	–	10%	–
AtlasIntel	Mar 7–9, 2020	528 (LV)	± 4.0%	48%	3%	–	–	–	–	–	40%	1%	–	3%	5%
Data for Progress	Mar 7–9, 2020	320 (LV)	± 5.5%	59%	–	–	–	–	–	–	38%	–	–	2%	–
Mitchell Research & Communications	Mar 8, 2020	602 (LV)	± 4.0%	54%	1%	–	1%	–	1%	–	33%	3%	–	3%	5%
Target Insyght	Mar 8, 2020	600 (LV)	± 4.0%	65%	2%	–	–	–	1%	–	24%	3%	–	3%	1%
Concord Public Opinion Partners/ The Welcome Party	Mar 7–8, 2020	305 (LV)	–	54%	–	–	–	–	–	–	23%	–	–	1%	22%
YouGov/Yahoo News	Mar 6–8, 2020	–(RV)	± 5.8%	54%	–	–	–	–	–	–	42%	–	–	–	–
Monmouth University	Mar 5–8, 2020	411 (LV)	± 4.8%	51%	3%	–	<1%	–	<1%	–	36%	1%	–	7%	2%
ROI Rocket	Mar 4–8, 2020	1,000 (LV)	± 3.1%	55%	–	–	–	–	–	–	45%	–	–	–	–
The Progress Campaign (D)[12]	Mar 3–7, 2020	417 (RV)	± 4.7%	51%	–	–	–	–	–	–	44%	–	–	1%	4%
EPIC-MRA/Detroit Free Press	Mar 4–6, 2020	400 (LV)	± 4.9%	51%	–	–	–	–	–	–	27%	–	–	9%	13%
	Mar 5, 2020	Warren withdraws from the race
	Mar 4, 2020	Bloomberg withdraws from the race
	Mar 2, 2020	Klobuchar withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
GlenGariff Group Inc./Detroit News/WDIV-TV	Feb 28 – Mar 2, 2020	600 (LV)	± 4.0%	29%	11%	–	6%	–	3%	–	23%	7%	–	6%	16%
	Feb 29, 2020	South Carolina primary; Steyer withdraws from the race after close of polls
YouGov/University of Wisconsin-Madison	Feb 11–20, 2020	662 (LV)	–	16%	13%	–	11%	–	8%	–	25%	13%	–	–	14%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
Baldwin Wallace University/Oakland University/Ohio Northern University	Jan 8–20, 2020	477 (RV)	–	27%	9.1%	–	6.3%	–	1.9%	–	21.6%	13.6%	3.5%	5.3%	10.6%
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
Emerson College	Oct 31 – Nov 3, 2019	454	± 4.6%	34%	–	3%	8%	3%	0%	–	28%	19%	2%	3%	–
	Nov 1, 2019	O'Rourke withdraws from the race
Siena Research/New York Times	Oct 13–26, 2019	203	–	30%	–	0%	3%	0%	1%	0%	17%	21%	1%	1%	23%
Kaiser Family Foundation	Sep 23 – Oct 15, 2019	208 (LV)	–	19%	–	1%	7%	2%	1%	1%	15%	25%	1%	0%	27%
Denno Research	Sep 21–24, 2019	217	–	27%	–	1%	4%	4%	1%	1%	12%	23%	1%	4%	23%
Climate Nexus	Jul 14–17, 2019	324 (LV)	–	35%	–	2%	4%	8%	1%	1%	16%	14%	1%	2%	13%
Zogby Analytics	May 23–29, 2019	268	± 6.0%	27%	–	1%	9%	7%	1%	4%	18%	8%	2%	5%	–
Denno Research	May 8–10, 2019	235	–	37%	–	3%	5%	4%	1%	1%	16%	9%	0%	4%	23%
	Apr 25, 2019	Biden announces his candidacy
	Apr 14, 2019	Buttigieg announces his candidacy
	Mar 14, 2019	O'Rourke announces his candidacy
Emerson College	Mar 7–10, 2019	317	± 5.5%	40%	–	3%	0%	12%	5%	2%	23%	11%	–	4%	–

Mississippi primary

The Mississippi Democratic primary is scheduled to take place on March 10, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Other/ Undecided
270toWin	March 10, 2020	March 4–9, 2020	72.5%	25.0%	0.5%	2.0%
FiveThirtyEight	March 10, 2020	until March 9, 2020	70.7%	23.4%	0.4%	5.5%
Average			71.6%	24.2%	0.5%	3.7%
Mississippi primary results (March 10, 2020)			81.1%	14.8%	0.4%	3.7%

Tabulation of individual polls of the 2020 Mississippi Democratic primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Other	Undecided
Swayable	Mar 8–9, 2020	1,247 (LV)	± 4.0%	68%	–	–	–	28%	–	4%	–
Data for Progress	Mar 4–7, 2020	340 (LV)	± 5.1%	77%	–	–	–	22%	–	1%	–
	Mar 5, 2020	Warren withdraws from the race
	Mar 4, 2020	Bloomberg withdraws from the race
	Mar 2, 2020	Klobuchar withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
NBC News/SurveyMonkey	Jul 2–16, 2019	282 (RV)	± 4.2%	47%	3%	3%	8%	21%	7%	5%	3%
Chism Strategies/Millsaps College	Jun 20–21, 2019	523 (LV)	± 4.3%	50%	2%	2%	5%	7%	7%	6%	21%

Missouri primary

The Missouri Democratic primary is scheduled to take place on March 10, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Other/ Undecided
270 to Win	March 10, 2020	March 4–9, 2020	57.6%	34.4%	2.7%	5.3%
RealClear Politics	March 10, 2020	March 4–9, 2020	61.0%	30.7%	2.5%	5.8%
FiveThirtyEight	March 10, 2020	until March 9, 2020	60.3%	32.6%	2.5%	4.6%
Average			59.6%	32.6%	2.6%	5.2%
Missouri primary results (March 10, 2020)			60.1%	34.6%	0.7%	4.6%

Tabulation of individual polls of the 2020 Missouri Democratic primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
Swayable	Mar 9, 2020	2,037 (LV)	± 3.0%	57%	–	–	–	–	–	36%	–	8%	–
Øptimus	Mar 7–9, 2020	402 (LV)	± 5.4%	68%	–	–	–	–	–	29%	–	3%	–
Data for Progress	Mar 4–7, 2020	348 (LV)	± 5.3%	62%	–	–	–	–	–	32%	4%	2%	–
	Mar 5, 2020	Warren withdraws from the race
Remington Research Group/Missouri Scout	Mar 4–5, 2020	1,040 (LV)	± 3.0%	53%	–	–	–	–	–	31%	–	10%	6%
Emerson Polling/Nexstar	Mar 4–5, 2020	425 (LV)	± 4.7%	48%	–	–	–	–	–	44%	–	8%	<6%
	Mar 4, 2020	Bloomberg withdraws from the race
	Mar 2, 2020	Klobuchar withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
The Progress Campaign (D)[13]	Feb 16–23, 2020	294 (RV)	± 5.1%	29%	14%	13%	–	4%	–	23%	12%	4%	–
Americana Analytics	Feb 20–21, 2020	1,198 (LV)	± 2.83%	22%	17%	11%	–	9%	–	11%	10%	1%	17%
Remington Research Group	Jan 22–23, 2020	1,460 (LV)	–	39%	14%	6%	–	8%	–	7%	9%	3%	14%
	Dec 3, 2019	Harris withdraws from the race
	Nov 1, 2019	O'Rourke withdraws from the race
Show Me Victories	Sept 13–16, 2019	400	± 5%	34%	–	10%	9%	1%	4%	14%	22%	8%	–
Remington Research Group	Jul 10–11, 2019	1,122	–	43%	–	5%	13%	–	1%	4%	15%	–	19%

North Dakota caucus

The North Dakota Democratic caucus is scheduled to take place on March 10, 2020.

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Tulsi Gabbard	Bernie Sanders	Other	Undecided
Swayable	Mar 7–9, 2020	383 (LV)	± 9%	65%	0%	31%	4%	–

Washington primary

The Washington Democratic primary is scheduled to take place on March 10, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Un- decided
270 to Win	Mar 10, 2020	Feb 15 – Mar 9, 2020	33.5%	34.0%	1.3%	34.7%
RealClear Politics	Mar 9, 2020	No averages at this time
FiveThirtyEight	Mar 10, 2020	until Mar 9, 2020	39.8%	37.1%	1.4%	21.7%
Average			36.65%	36.55%	1.35%	28.2%

Tabulation of individual polls of the 2020 Washington Democratic primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Jay Inslee	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
Swayable	Mar 9, 2020	1,840 (LV)	± 3.0%	39%	–	–	–	–	–	37%	–	–	25%	–
Data for Progress	Mar 7–9, 2020	497 (LV)	± 5.1%	49%	–	–	–	–	–	43%	6%	–	2%	–
Survey USA/KING-TV	Mar 4–6, 2020	550 (LV)	± 5.4%	36%	–	–	–	–	–	35%	10%	–	13%	5%
	Mar 5, 2020	Warren withdraws from the race
Data for Progress	Mar 4–5, 2020	737 (LV)	± 3.6%	47%	–	–	–	–	–	44%	5%	–	3%	–
	Mar 4, 2020	Bloomberg withdraws from the race
	Mar 2, 2020	Klobuchar withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
Elway Research/Cascade Public Media	Feb 15–18, 2020	404 (LV)	± 5.0%	10%	15%	9%	–	–	11%	21%	11%	0%	2%	22%
	Feb 11, 2020	Yang withdraws from the race
Survey USA/KING-TV	Jan 26–28, 2020	536 (LV)	± 6.2%	21%	12%	8%	–	–	3%	26%	16%	4%	2%	7%
	Dec 3, 2019	Harris withdraws from the race
	Aug 21, 2019	Inslee withdraws from the race
Zogby Analytics	Jul 22 – Aug 1, 2019	1,265 (LV)	± 2.8%	19%	–	5%	9%	6%	1%	18%	14%	2%	11%	16%

Arizona primary

The Arizona Democratic primary is scheduled to take place on March 17, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Other/ Undecided
270 to Win	Mar 17, 2020	Mar 3–16, 2020	50.6%	29.4%	1.0%	19.0%
RealClear Politics	Mar 17, 2020	Mar 6–15, 2020	51.7%	33.7%	1.0%	13.6%
FiveThirtyEight	Mar 17, 2020	until Mar 16, 2020	51.6%	26.9%	1.1%	20.4%
Average			51.3%	30.0%	1.0%	17.7%

Tabulation of individual polls of the 2020 Arizona Democratic primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
Swayable	Mar 16, 2020	1,167 (LV)	± 5.0%	53%	–	–	–	29%	–	–	19%	–
Marist/NBC News	Mar 10–15, 2020	523 (LV)	± 6.0%	53%	–	–	–	36%	–	–	8%	3%
		913 (RV)	± 4.5%	50%	–	–	–	37%	–	–	9%	5%
Monmouth University	Mar 11–14, 2020	373 (LV)	± 5.1%	51%	5%	3%	–	31%	3%	–	2%	5%
Latino Decisions/Univision/ Arizona State University	Mar 6–11, 2020	541 (LV)	± 4.2%	57%	–	–	–	38%	–	–	–	5%
				51%	–	–	–	34%	–	–	6%	8%
	March 4–5, 2020	Bloomberg and Warren withdraw from the race
OH Predictive Insights	Mar 3–4, 2020	398 (LV)	± 4.9%	45%	12%	–	–	17%	13%	–	4%	9%
	March 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
	February 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
	Dec 3, 2019	Harris withdraws from the race
OH Predictive Insights	Oct 31 – Nov 8, 2019	260 (LV)	± 6.1%	29%	–	9%	5%	16%	18%	4%	19%	–
Emerson Polling	Oct 25–28, 2019	339	± 5.2%	28%	–	12%	4%	21%	21%	5%	7%	–
Siena Research/New York Times	Oct 13–26, 2019	209	–	24%	–	5%	3%	16%	15%	1%	1%	31%
Change Research	Sep 27–28, 2019	396 (LV)	–	15%	–	13%	4%	19%	35%	8%	7%	–
Bendixen&Amandi	Sep 9–12, 2019	250	± 4.3%	29%	–	5%	4%	18%	24%	2%	8%	10%
Zogby Analytics	May 23–29, 2019	197	± 7.0%	35%	–	6%	4%	16%	10%	0%	11%	–

Florida primary

The Florida Democratic primary is scheduled to take place on March 17, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Other/ Undecided
270 to Win	Mar 17, 2020	Mar 5–16, 2020	65.5%	23.0%	1.8%	9.7%
RealClear Politics	Mar 17, 2020	Mar 6–12, 2020	64.7%	25.7%	2.0%	7.6%
FiveThirtyEight	Mar 17, 2020	until Mar 16, 2020	63.8%	24.7%	1.4%	10.1%
Average			64.7%	24.5%	1.7%	9.1%

Polling from February 12, 2020, to March 17, 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Other	Un- decided
Swayable	Mar 16, 2020	4,035 (LV)	± 2.0%	64%	–	–	–	25%	–	12%	–
AtlasIntel	Mar 14–16, 2020	532 (LV)	± 4.0%	67%	–	–	–	27%	–	4%	2%
Point Blank Political	Mar 11–13, 2020	3,165 (LV)	± 2.3%	61%	–	–	–	32%	–	–	7%
				57%	2%	2%	0%	29%	4%	1%	5%
Emerson College/Nexstar	Mar 11–12, 2020	434 (LV)	± 4.7%	65%	–	–	–	27%	–	2%	6%
Gravis Marketing	Mar 10–12, 2020	516 (LV)	± 4.3%	66%	–	–	–	25%	–	–	9%
ROI Rocket	Mar 6–12, 2020	877 (LV)	± 3.3%	67%	–	–	–	27%	–	–	–
Latino Decisions/Univision	Mar 6–12, 2020	531 (LV)	± 4.3%	67%	–	–	–	32%	–	–	2%
				63%	–	–	–	25%	–	8%	4%
University of North Florida	Mar 5–10, 2020	1,502 (LV)	± 2.5%	66%	2%	1%	<1%	22%	2%	1%	7%
St Pete Polls/FloridaPolitics.com	Mar 6–8, 2020	2,480 (LV)	± 2.0%	69%	5%	2%	1%	14%	1%	0%	9%
Point Blank Political	Mar 6–8, 2020	3,376 (LV)	± 2.3%	61%	–	–	–	32%	–	–	7%
				55%	2%	2%	1%	29%	4%	2%	7%
Florida Atlantic University	Mar 5–7, 2020	399 (LV)	± 4.9%	61%	–	–	–	25%	–	3%	10%
	Mar 4–5, 2020	Bloomberg and Warren withdraw from the race
St Pete Polls/FloridaPolitics.com	Mar 4, 2020	1,882 (LV)	± 2.3%	61%	14%	1%	1%	12%	5%	0%	6%
	Mar 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
St Pete Polls	Feb 25–26, 2020	2,788 (LV)	± 1.9%	34%	25%	8%	4%	13%	5%	1%	10%
Saint Leo University	Feb 17–22, 2020	342 (LV)	–	25%	25%	11%	5%	17%	7%	4%	7%
Florida Southern College	Feb 17–21, 2020	313 (LV)	± 5.54%	22%	23%	9%	5%	18%	12%	1%	9%
St Pete Polls	Feb 18–19, 2020	2,412 (LV)	± 2.0%	27%	32%	8%	7%	11%	5%	2%	10%
Tel Opinion Research/Politico/ Let’s Preserve the American Dream	Feb 13–18, 2020	800 (LV)	± 3.46%	20%	26%	8%	5%	13%	7%	5%	16%
St Pete Polls	Feb 12–13, 2020	3,047 (LV)	± 1.8%	26%	27%	11%	9%	10%	5%	1%	11%

Polling before February 11, 2020
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Un- decided
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
St. Pete Polls	Jan 27–28, 2020	2,590 (LV)	± 1.9%	41%	17%	–	6%	–	5%	–	9%	7%	2%	2%	10%
Tel Opinion Research/Let’s Preserve the American Dream/Politico	Jan 21–23, 2020	600 (LV)	± 4%	41%	–	–	–	–	–	–	21%	18%	–	–	20%
				29%	4%	–	4%	–	4%	–	17%	12%	2%	2%	28%
	Jan 13, 2020	Booker withdraws from the race
Florida Atlantic University	Jan 9–12, 2020	494	± 4.4%	42%	7%	3%	3%	–	6%	–	16%	10%	5%	5%	4%
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
	Nov 1, 2019	O'Rourke withdraws from the race
Siena College/New York Times	Oct 13–26, 2019	650 (RV)	± 4.4%	27%	–	0%	5%	1%	2%	0%	13%	19%	0%	1%	29%
Tel Opinion Research	Sep 15–18, 2019	800 (LV)	± 3.54%	43%	–	–	–	–	–	–	10%	26%	–	–	18%
				37%	–	–	5%	6%	–	–	9%	18%	2%	–	20%
				24%	–	–	2%	3%	–	–	5%	11%	1%	3%	49%
Florida Atlantic University	Sep 12–15, 2019	407	± 4.9%	34%	–	1%	5%	4%	0%	2%	14%	24%	2%	8%	6%
St. Pete Polls	Jun 22–23, 2019	2,022	± 2.2%	47%	–	3%	8%	6%	–	2%	8%	12%	–	7%	6%
Change Research	Jun 16–17, 2019	1,130	± 2.9%	33%	–	2%	15%	7%	2%	3%	20%	15%	3%	2%	–
Quinnipiac University	Jun 12–17, 2019	417	± 5.8%	41%	–	1%	8%	6%	1%	1%	14%	12%	<1%	1%	12%
Climate Nexus	Jun 7–11, 2019	676	± 2.6%	32%	–	2%	6%	6%	1%	2%	16%	10%	2%	9%	14%
Zogby Analytics	May 23–29, 2019	228	± 6.5%	34%	–	2%	6%	2%	1%	4%	18%	7%	1%	6%	–
Florida Atlantic University	May 16–19, 2019	403	± 4.9%	39%	–	1%	9%	7%	1%	5%	12%	12%	1%	14%	–
Tel Opinion Research*	May 8, 2019	800	± 3.5%	39%	–	1%	3%	5%	1%	1%	16%	5%	–	–	28%
	Apr 25, 2019	Biden announces his candidacy
	Apr 14, 2019	Buttigieg announces his candidacy
Tel Opinion Research*	Mar 21, 2019	800	± 3.5%	37%	–	2%	–	4%	1%	5%	13%	6%	–	–	31%
	Mar 14, 2019	O'Rourke announces his candidacy
Bendixen & Amandi International	Mar 1–4, 2019	300	–	26%	1%	1%	0%	9%	1%	1%	11%	4%	0%	0%	46%
	Feb 19, 2019	Sanders announces his candidacy
	Feb 9, 2019	Warren announces her candidacy
	Feb 1, 2019	Booker announces his candidacy
	Jan 21, 2019	Harris announces her candidacy
Saint Leo University	May 25–31, 2018	–	–	21%	–	3%	–	4%	–	–	11%	7%	–	34%	17%

Illinois primary

The Illinois Democratic primary is scheduled to take place on March 17, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Un- decided
270toWin	Mar 17, 2020	Mar 7–16, 2020	58.6%	30.2%	2.0%	9.2%
RealClear Politics	Mar 17, 2020	Mar 10–12, 2020	60.0%	30.5%	–	9.5%
FiveThirtyEight	Mar 17, 2020	until Mar 16, 2020	61.5%	26.6%	1.5%	10.4%
Average			60.0%	29.1%	1.8%	9.1%

Tabulation of individual polls of the 2020 Illinois Democratic primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Other	Undecided
Swayable	Mar 16, 2020	1,861 (LV)	± 3.0%	63%	–	–	–	–	28%	–	10%	–
Emerson College/Nexstar	Mar 11–12, 2020	567 (LV)	± 4.1%	57%	–	–	–	–	36%	–	2%	6%
Gravis Marketing	Mar 10–12, 2020	549 (LV)	± 4.2%	63%	–	–	–	–	25%	–	–	12%
ROI Rocket	Mar 6–12, 2020	960 (LV)	± 3.1%	57%	–	–	–	–	34%	–	–	–
Victory Research	Mar 7–9, 2020	1,200 (LV)	± 2.83%	55%	–	–	–	–	36%	–	1%	8%
Ogden & Fry/Northwest Side GOP Club	Mar 8, 2020	457(LV)	± 4.58%	64%	–	–	–	–	32%	–	4%	–
				55%	–	–	–	–	26%	–	2%	16%
	Mar 1–5, 2020	Buttigieg, Klobuchar, Bloomberg, and Warren withdraw from the race
Victory Research	Feb 17–19, 2020	1,200(LV)	± 2.83%	20.3%	14.5%	11.4%	–	6.3%	25.6%	6.6%	4.4%	10.9%
Southern Illinois University	Feb 10–17, 2020	475 (LV)	± 4.5%	14%	17%	13%	–	8%	22%	6%	2%	17%
	Dec 3, 2019	Harris withdraws from the race
Victory Research	Nov 27 – Dec 1, 2019	1,500 (RV)	±2.83%	23.2%	3.6%	15.9%	3.2%	2.6%	15.0%	17.4%	12.3%	6.9%
Victory Research	Jul 26–29, 2019	1,200	± 2.83%	36.1%	–	9.3%	8.6%	1.7%	15.2%	12.8%	9.2%	7.3%

Wisconsin primary

The Wisconsin Democratic primary is scheduled to take place on April 7, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Other/ Undecided
270 to Win	April 5, 2020	March 6–29, 2020	55.3%	37.0%	7.7%
RealClear Politics	April 5, 2020	March 6–29, 2020	55.3%	37.0%	7.7%
FiveThirtyEight	April 5, 2020	until March 29, 2020	51.6%	36.0%	12.4%
Average			54.1%	36.7%	9.2%

Tabulation of individual polls of the 2020 Wisconsin Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Un- decided
Marquette University Law School[14]	Mar 24–29, 2020	394 (LV)	± 5.9%	62%	–	–	–	–	–	34%	–	–	–	4%
Public Policy Polling	Mar 10–11, 2020	898(LV)	–	55%	–	–	–	–	–	39%	–	–	3%	3%
YouGov/Yahoo News	Mar 6–8, 2020	–(RV)	± 6.4%	49%	–	–	–	–	–	38%	–	–	–	–
	Mar 1–5, 2020	Buttigieg, Klobuchar, Bloomberg, and Warren withdraw from the race
Marquette University Law School	Feb 19–23, 2020	490 (LV)	± 5.1%	15%	17%	–	13%	–	11%	29%	9%	–	2%	4%
YouGov/University of Wisconsin-Madison	Feb 11–20, 2020	428 (LV)	–	13%	13%	–	12%	–	9%	30%	12%	–	–	11%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
Baldwin Wallace University/Oakland University/Ohio Northern University	Jan 8–20, 2020	464 (RV)	–	21.8%	8.4%	–	7.7%	–	3%	28.4%	14.7%	2.2%	2.5%	10.9%
	Jan 13, 2020	Booker withdraws from the race
Marquette University Law School[15]	Jan 8–12, 2020	358 (LV)	± 6.3%	23%	6%	1%	15%	–	4%	19%	14%	6%	3%	9%
Fox News	Jan 5–8, 2020	671 (LV)	± 3.5%	23%	7%	3%	9%	–	4%	21%	13%	3%	6%	10%
Marquette University Law School[16]	Dec 3–8, 2019	358 (LV)	± 6.3%	23%	3%	4%	15%	–	3%	19%	16%	3%	3%	11%
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
Marquette University Law School	Nov 13–17, 2019	801 (RV)	–	30%	–	3%	13%	2%	3%	17%	15%	2%	6%	10%
Siena Research/New York Times	Oct 13–26, 2019	292	–	23%	–	1%	5%	1%	0%	20%	25%	2%	2%	19%
Kaiser Family Foundation	Sep 23 – Oct 15, 2019	274 (LV)	–	17%	–	2%	6%	3%	3%	10%	22%	2%	1%	35%
Fox News	Sep 29 – Oct 2, 2019	663 (LV)	± 3.5%	28%	–	2%	7%	5%	2%	17%	22%	2%	5%	9%
Marquette University Law School	Aug 25–29, 2019	444 (RV)	± 5.3%	28%	–	1%	6%	3%	1%	20%	17%	2%	5%	13%
Change Research	Aug 9–11, 2019	935 (LV)	± 3.2%	20%	–	1%	9%	5%	2%	24%	29%	2%	5%	–
Change Research	Jun 29 – Jul 4, 2019	1261 (LV)	–	18%	–	3%	15%	17%	1%	19%	19%	1%	6%	–
Zogby Analytics	May 23–29, 2019	238 (LV)	± 6.4%	28%	–	2%	7%	7%	3%	13%	14%	0%	2%	–
	Apr 25, 2019	Biden announces his candidacy
Zogby Analytics	Apr 15–18, 2019	485 (LV)	± 4.5%	24%	–	4%	10%	7%	4%	20%	6%	1%	11%	14%
	Apr 14, 2019	Buttigieg announces his candidacy
Emerson College	Mar 15–17, 2019	324 (LV)	± 5.4%	24%	–	2%	1%	5%	4%	39%	14%	1%	10%	–

Ohio primary

The Ohio Democratic primary was originally scheduled to take place on March 17, 2020. Due to the COVID-19 pandemic, the primary was delayed. Initially, the Governor suggested the primary be held on June 2, 2020, however, further deliberations resulted in the legislature and Governor agreeing on suspending in-person voting, and selecting a mail-in ballot deadline of April 28, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Other/ Undecided
270 to Win	Mar 16, 2020	Mar 10–13, 2020	57.5%	35.0%	7.5%
RealClear Politics	Mar 16, 2020	Mar 10–13, 2020	57.5%	35.0%	7.5%
FiveThirtyEight	Mar 16, 2020	until Mar 13, 2020	58.7%	32.3%	9.0%
Average			57.9%	34.1%	8.0%

Tabulation of individual polls of the 2020 Ohio Democratic primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Apr 8, 2020	Sanders suspends his campaign: Politico Story
Swayable	Mar 16, 2020	2,027 (LV)	± 3.0%	66%	–	–	–	–	24%	–	–	10%	–
Marist/NBC News	Mar 10–13, 2020	486 (LV)	± 5.6%	58%	–	–	–	–	35%	–	–	4%	4%
		830 (RV)	± 4.1%	56%	–	–	–	–	36%	–	–	4%	4%
Emerson College/Nexstar	Mar 11–12, 2020	464 (LV)	± 4.5%	57%	–	–	–	–	35%	–	–	1%	7%
ROI Rocket	Mar 6–12, 2020	880 (LV)	± 3.3%	61%	–	–	–	–	33%	–	–	–	–
	Mar 5, 2020	Warren withdraws from the race
	Mar 4, 2020	Bloomberg withdraws from the race: NYT Story
	Mar 2, 2020	Klobuchar withdraws from the race: NYT Story
	Mar 1, 2020	Buttigieg withdraws from the race: NYT Story
	Feb 29, 2020	South Carolina primary; Steyer withdraws from the race after close of polls
	Feb 11, 2020	New Hampshire primary; Yang and Bennet withdraw from the race after close of polls
	Feb 3, 2020	Iowa Caucuses
Baldwin Wallace University/Oakland University/Ohio Northern University	Jan 8–20, 2020	428 (RV)	–	32.1%	10.1%	–	6.1%	–	20.8%	10.7%	2.1%	5.7%	9.8%
	Jan 13, 2020	Booker withdraws from the race
	Jan 10, 2020	Williamson withdraws from the race
	Jan 2, 2020	Castro withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
	Nov 1, 2019	O'Rourke withdraws from the race
	Oct 24, 2019	Ryan withdraws from the race
Climate Nexus	Oct 1–7, 2019	443 (LV)	–	32%	–	3%	5%	6%	13%	21%	3%	17%	–
Emerson	Sep 29 – Oct 2, 2019	353 (LV)	± 5.2%	29%	–	0%	5%	7%	27%	21%	3%	5%	2%
Quinnipiac	Jul 17–22, 2019	556	± 5.1%	31%	–	1%	6%	14%	14%	13%	1%	6%	11%
Zogby Analytics	May 23–29, 2019	222	± 6.6%	29%	–	3%	6%	5%	19%	12%	3%	6%	–

Kansas primary

The Kansas Democratic primary is scheduled to take place on May 2, 2020.

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Tulsi Gabbard	Bernie Sanders	Other	Undecided
	Apr 8, 2020	Sanders suspends campaign
	Mar 19, 2020	Gabbard withdraws from the race
Public Policy Polling	Mar 10–11, 2020	550 (LV)	–	59%	3%	35%	–	4%

Oregon primary

The Oregon Democratic primary is scheduled to take place on May 19, 2020.

Poll source	Date(s) administered	Sample size	Margin of error	Bernie Sanders	Joe Biden	Undecided	Beto O'Rourke	Kamala Harris	Elizabeth Warren	Cory Booker	Andrew Yang	Pete Buttigieg	Other
Zogby Analytics	Mar 18–19, 2019	238	± 6.4%	27%	26%	11%	8%	6%	6%	4%	4%	3%	7%

Delaware primary

The Delaware Democratic primary was scheduled to take place on April 28, 2020, but was delayed due to the COVID-19 pandemic, and will instead occur on June 2, 2020.

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Tulsi Gabbard	Kamala Harris	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Apr 8, 2020	Sanders suspends his campaign
	Mar 19, 2020	Gabbard withdraws from the race
	Mar 1–5, 2020	Buttigieg, Klobuchar, Bloomberg, and Warren withdraw from the race
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
Data For Progress	Nov 15–25, 2019	481 (LV)	–	35%	3%	8%	3%	1%	13%	11%	1%	10%	15%

Indiana primary

The Indiana Democratic primary was scheduled to take place on May 5, 2020, but was delayed due to the COVID-19 pandemic, and will instead occur on June 2, 2020.

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Pete Buttigieg	Kamala Harris	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Apr 8, 2020	Sanders suspends his campaign
	Nov 1, 2019–March 5, 2020	O'Rourke, Harris, Buttigieg and Warren withdraw from the race
We Ask America	Apr 29–May 5, 2019	280	± 5.9%	33%	20%	3%	2%	23%	2%	1%	15%

Maryland primary

The Maryland Democratic primary was scheduled to take place on April 28, 2020, but was delayed due to the COVID-19 pandemic, and will instead occur on June 2, 2020.

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Apr 8, 2020	Sanders suspends his campaign
	Mar 1–5, 2020	Buttigieg, Klobuchar, Bloomberg, and Warren withdraw from the race
Gonzales Research & Media Services	Feb 22–28, 2020	331 (LV)	± 5.5%	19%	15%	5%	–	4%	23%	8%	–	27%
Goucher College	Feb 13–19, 2020	371 (LV)	± 5.1%	18%	16%	7%	–	6%	24%	6%	4%	18%
	Dec 3, 2019	Harris withdraws from the race
Goucher College	Sept 13–19, 2019	300 (LV)	± 5.6%	33%	–	5%	6%	1%	10%	21%	9%	15%

Montana primary

The Montana Democratic primary is scheduled to take place on June 2, 2020. Polls with a sample size of <100 are marked in red to indicate a lack of reliability.

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Steve Bullock	Pete Buttigieg	Kamala Harris	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Apr 8, 2020	Sanders suspends his campaign
	Nov 1, 2019–March 5, 2020	O'Rourke, Bullock, Harris, Yang, Buttigieg and Warren withdraw from the race
Montana State University Billings	Oct 7–16, 2019	40 (LV)	–	15%	5%	2%	2%	5%	2%	40%	No voters	2%	25%

New Mexico primary

The New Mexico democratic primary is scheduled to take place on June 2, 2020.

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Tulsi Gabbard	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Apr 8, 2020	Sanders suspends his campaign
	Mar 1–19, 2020	Buttigieg, Klobuchar, Bloomberg, Warren, and Gabbard withdraw from the race
	Jan 13–Feb 11, 2020	Booker and Yang withdraw from the race
Emerson Polling	Jan 3–6, 2020	447 (RV)	± 4.6%	27%	3%	2%	7%	2%	2%	28%	8%	10%	11%	-

Pennsylvania primary

The Pennsylvania Democratic primary was scheduled to take place on April 28, 2020, but was delayed due to the COVID-19 pandemic, and is instead scheduled for June 2, 2020.

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Other/ Undecided
270 to Win	Mar 18, 2020	Feb 11–Mar 8, 2020	39.5%	28.0%	32.5%
RealClear Politics	Feb 23, 2020	Jan 20–Feb 20, 2020	39.5%	28.0%	32.5%
FiveThirtyEight	Mar 8, 2020	until Feb 20, 2020	54.4%	29.3%	16.3%
Average			44.5%	28.4%	27.1%

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Apr 8, 2020	Sanders suspends his campaign
YouGov/Yahoo News	Mar 6–8, 2020	–(RV)	± 5.1%	59%	–	–	–	–	–	31%	–	–	–
	Mar 1–5, 2020	Buttigieg, Klobuchar, Bloomberg and Warren withdraw from the race
YouGov/University of Wisconsin-Madison	Feb 11–20, 2020	537 (LV)	–	20%	19%	–	12%	–	–	25%	9%	5%	10%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
Franklin & Marshall College	Jan 20–26, 2020	292 (RV)	± 9.0%	22%	7%	–	6%	–	–	15%	14%	18%	19%
Baldwin Wallace University/Oakland University/Ohio Northern University]]	Jan 8–20, 2020	502 (RV)	–	31.3%	9.1%	–	6.5%	–	–	20.5%	11.5%	8.8%	11%
	Dec 3, 2019–Jan 13, 2020	Harris and Booker withdraw from the race
	Nov 24, 2019	Bloomberg announces his candidacy
	Nov 1, 2019	O'Rourke withdraws from the race
Franklin & Marshall College	Oct 21–27, 2019	226 (RV)	± 8.9%	30%	–	1%	8%	1%	<1%	12%	18%	15%	16%
Siena Research/New York Times	Oct 13–26, 2019	304	–	28%	–	0%	4%	1%	0%	14%	16%	3%	30%
Kaiser Family Foundation	Sep 23–Oct 15, 2019	246 (LV)	–	27%	–	1%	3%	4%	No voters	14%	18%	5%	29%
Susquehanna Polling and Research Inc.	Sep 30–Oct 6, 2019	307 (RV)	± 5.6%	17%	–	0%	8%	1%	0%	6%	9%	7%	52%
Franklin & Marshall College	Jul 29–Aug 4, 2019	295	± 8.7%	28%	–	2%	6%	8%	1%	12%	21%	3%	19%
Zogby Analytics	May 23–29, 2019	246	± 6.3%	46%	–	2%	9%	3%	2%	15%	8%	2%	–
Quinnipiac University	May 9–14, 2019	431	± 6.2%	39%	–	5%	6%	8%	2%	13%	8%	3%	12%
	Apr 25, 2019	Biden announces his candidacy
	Apr 14, 2019	Buttigieg announces his candidacy
Muhlenberg College	Apr 3–10, 2019	405	± 5.5%	28%	–	3%	4%	8%	3%	16%	8%	9%	20%
Emerson College	Mar 26–28, 2019	359	± 5.1%	39%	–	4%	6%	5%	5%	20%	11%	10%	–

Georgia primary

The Georgia Democratic primary was originally scheduled to take place on March 24, 2020, but was delayed due to the COVID-19 pandemic, first to May 19, 2020, and then further delayed to June 9, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates Polled	Joe Biden	Bernie Sanders	Undecided
FiveThirtyEight	Mar 14, 2020	until Feb 13, 2020	67.3%	30.1%	2.6%

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Apr 8, 2020	Sanders suspends his campaign
The Progress Campaign (D)	Mar 12–21, 2020	913 (RV)	± 4.6%	63%	–	–	–	34%	–	–	–	2.3%
University of Georgia	Mar 4–14, 2020	807	± 3.4%	66%	–	–	–	22%	–	–	1%	11%
	Mar 5, 2020	Warren withdraws from the race
	Mar 4, 2020	Bloomberg withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
Landmark Communications	Feb 12, 2020	500	± 4.3%	32%	14%	5%	–	14%	4%	–	6%	26%
	Feb 11, 2020	Yang withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
SurveyUSA	Nov 15–18, 2019	536	± 5.2%	36%	6%	7%	6%	17%	14%	–	5%	9%
Climate Nexus	Nov 4–10, 2019	457	± 3.6%	31%	–	4%	4%	14%	14%	2%	11%	19%
Landmark Communications	Sep 18–21, 2019	500	± 4.1%	41%	–	5%	6%	8%	17%	2%	6%	15%
Change Research	Sep 7–11, 2019	755	± 3.6%	33%	–	7%	7%	17%	22%	3%	10%	–
SurveyMonkey	Jul 2–16, 2019	402	± 6.4%	31%	–	5%	15%	12%	13%	4%	11%	9%

New York primary

The New York Democratic primary was scheduled to take place on April 28, 2020, but was delayed due to the COVID-19 pandemic, and is instead scheduled for June 23, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Other/ Undecided
FiveThirtyEight	Mar 18, 2020	until Mar 18, 2020	51.7%	28.9%	21.4%

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Other	Un- decided
	Apr 8, 2020	Sanders suspends his campaign
	Mar 19, 2020	Gabbard withdraws from the race
	Mar 1–5, 2020	Buttigieg, Klobuchar, Bloomberg, and Warren withdraw from the race
Siena College Research Institute	Feb 16–20, 2020	315 (RV)	–	13%	21%	9%	–	9%	25%	11%	1%	11%
	Feb 3, 2020	Iowa caucus is held
Civis Analytics/Data For Progress	Jan 13–19, 2020	845 (LV)	–	30%	17%	7%	–	2%	17%	14%	15%	–
	Dec 3, 2019	Harris withdraws from the race
Siena College	Nov 12–18, 2019	797 (RV)	± 4.0%	24%	–	5%	3%	1%	13%	14%	12%	29%
Siena College	Oct 6–10, 2019	340 (RV)	± 6.5%	21%	–	4%	4%	1%	16%	21%	10%	24%
	Sep 20, 2019	de Blasio withdraws from the race
Siena College*	Sep 8–12, 2019	359 (RV)	± 6.1%	22%	–	3%	4%	1%	15%	17%	4%	34%
	Aug 28, 2019	Gillibrand withdraws from the race

Head-to-head polls

Poll source	Date(s) administered	Sample size	Margin of error	Bill de Blasio	Kirsten Gillibrand	Other	Undecided
Siena College	Jun 2–6, 2019	385	–	25%	56%	11%	8%

New Jersey primary

The New Jersey Democratic primary was scheduled to take place on June 2, 2020, but was delayed due to the COVID-19 pandemic, and is instead scheduled for July 7, 2020.

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Undecided
FiveThirtyEight	Mar 8, 2020	until Feb 18, 2020	35.5%	30.5%	34.0%

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 5, 2020	Warren withdraws from the race
	Mar 4, 2020	Bloomberg withdraws from the race
	Mar 3, 2020	Super Tuesday
	Mar 2, 2020	Klobuchar withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
	Feb 29, 2020	South Carolina primary; Steyer withdraws from the race after close of polls
	Feb 22, 2020	Nevada caucuses
FDU[17]	Feb 12–16, 2020	357 (RV)	–	16%	23%	–	10%	–	–	25%	8%	7%	11%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race
	Feb 3, 2020	Iowa caucuses
Emerson College	Jan 16–19, 2020	388	± 4.9%	28%	9%	–	6%	–	–	25%	15%	16%	–
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
Monmouth University	Sep 12–16, 2019	713	± 3.7%	26%	–	9%	6%	6%	0%	18%	20%	7%	8%
Change Research	Aug 16–20, 2019	1176	± 2.9%	26%	–	5%	12%	8%	2%	21%	23%	3%	–

Connecticut primary

The Connecticut Democratic primary was scheduled to take place on April 28, 2020, but was delayed due to the COVID-19 pandemic, first to June 2, 2020, and then further delayed to August 11, 2020.

Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Bernie Sanders	Pete Buttigieg	Elizabeth Warren	Other	Undecided
	Apr 8, 2020	Sanders suspends his campaign
GreatBlue Research/Sacred Heart University/Hartford Courant	Mar 24–Apr 3, 2020	– (RV)	–	52.0%	32.5%	–	–	1.4%	14.1%
GreatBlue Research/Sacred Heart University/Hartford Courant	Feb 24–Mar 12, 2020	383 (RV)	–	42.1%	24.5%	–	–	19.5%	13.8%
	Mar 5, 2020	Warren withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
GreatBlue Research/Sacred Heart University/Hartford Courant[18]	Dec 16, 2019–Jan 2, 2020	348 (RV)	–	33.0%	19.3%	11.2%	17.8%	3.4%	15.2%

Notes

Partisan clients

Additional candidates

See also

• Nationwide opinion polling for the 2020 Democratic Party presidential primaries
• 2020 Democratic National Convention
• Opinion polling for the 2020 Republican Party presidential primaries
• Nationwide opinion polling for the 2020 United States presidential election
• Statewide opinion polling for the 2020 United States presidential election

External links

• Primary poll tracker from FiveThirtyEight