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For senators and representatives who represented defunct parties or switched parties intra-term, only their latest party while in office is reflected. Most states, due to not having long-running deans until the 1900s, have tables only starting from that decade.

Alabama (TO CHECK)

[edit]
Senior members of Alabama's congressional delegation
Congress Dates Senior senator
(Seniority and tenure)
(Cause of departure)
Delegation dean
(Combined seniority
and tenure)
House dean
(Seniority and tenure)
(Cause of departure)
16th December 14, 1819
March 4, 1821

William R. King[A][B][C]
Seniority from December 14, 1819[a]
(24 years, 123 days)
(appointed Minister to France)
King
(Senate)

Seniority from December 14, 1819[b]
(24 years, 123 days)


John Crowell[D][E]
Seniority from December 14, 1819
(1 year, 79 days)
(retired)
17th March 4, 1821
March 4, 1823

Gabriel Moore[F]
Seniority from March 4, 1821
(7 years, 364 days)
(retired)
18th March 4, 1823
March 4, 1825
19th March 4, 1825
March 4, 1827
20th March 4, 1827
March 4, 1829
21st March 4, 1829
March 4, 1831
No clear dean[c]
22nd March 4, 1831
March 4, 1833
Co-deans:

Clement C. Clay,
Dixon H. Lewis

Seniority from March 4, 1829
(5 years, 364 days)
(Clay ran for Alabama governor)
23rd March 4, 1833
March 4, 1835
24th March 4, 1835
March 4, 1837

Dixon H. Lewis[G][H]
Seniority from March 4, 1829
(15 years, 49 days)
(appointed to Senate)
25th March 4, 1837
March 4, 1839
26th March 4, 1839
March 4, 1841
27th March 4, 1841
March 4, 1843
28th March 4, 1843
April 15, 1844
April 15, 1844
April 22, 1844

Arthur P. Bagby
Seniority from November 24, 1841[d]
(6 years, 205 days)
(appointed Minister to Russia)
Lewis
(House and Senate)

Seniority from March 4, 1829
(15 years, 49 days)

April 22, 1844
March 4, 1845

Reuben Chapman
Seniority from March 4, 1835
(11 years, 364 days)
(ran for Alabama governor)
29th March 4, 1845
March 4, 1847
30th March 4, 1847
June 16, 1848

George S. Houston
Seniority from March 4, 1841
(7 years, 364 days)
(retired)
June 16, 1848
October 25, 1848

Dixon H. Lewis[C]
Seniority from April 22, 1844[e]
(4 years, 186 days)
(died)
October 25, 1848
March 4, 1849

William R. King[I][J]
Seniority from July 1, 1848[e]
(4 years, 172 days)
(resigned)
Houston
(House)

Seniority from March 4, 1841
(7 years, 364 days)

31st March 4, 1849
March 4, 1851
Hilliard
(House)

Seniority from March 4, 1845
(5 years, 364 days)


Henry W. Hilliard
Seniority from March 4, 1845
(5 years, 364 days)
(retired)
32nd March 4, 1851
December 20, 1852
Co-deans:
Cobb, Harris
(House)

Seniority from March 4, 1847
(9 years, 364 days)

Co-deans:

Williamson R. W. Cobb,
Sampson W. Harris
Seniority from March 4, 1847
(9 years, 364 days)
(Harris retired)
December 20, 1852
March 4, 1853

Jeremiah Clemens
Seniority from November 30, 1849[d]
(3 years, 93 days)
(lost re-election)
33rd March 4, 1853
March 4, 1855

Benjamin Fitzpatrick[K][L]
Seniority from January 14, 1853[f][1]
(8 years, 21 days)
(withdrew)
34th March 4, 1855
March 4, 1857
35th March 4, 1857
March 4, 1859
Cobb
(House)

Seniority from March 4, 1847
(13 years, 332 days)


Williamson R. W. Cobb
Seniority from March 4, 1847
(13 years, 332 days)
(withdrew)
36th March 4, 1859
January 30, 1861
January 30, 1861
February 4, 1861
Fitzpatrick
(Senate)

Seniority from January 14, 1853
(8 years, 21 days)

Vacant
(Civil War and
Reconstruction)
February 4, 1861
March 4, 1861
Vacant
(Civil War and
Reconstruction)
None
37th March 4, 1861
March 4, 1863
38th March 4, 1863
March 4, 1865
39th March 4, 1865
March 4, 1867
40th March 4, 1867
July 13, 1868
July 13, 1868
July 21, 1868

George E. Spencer
Seniority from July 13, 1868[g]
(10 years, 233 days)
(retired)
July 21, 1868
July 22, 1868
Spencer
(Senate)

Seniority from July 13, 1868
(10 years, 233 days)

No clear dean[h][i]
July 22, 1868
March 4, 1869

C. W. Buckley
Seniority from July 21, 1868[j]
(4 years, 225 days)
(retired)
41st March 4, 1869
March 4, 1871
42nd March 4, 1871
March 4, 1873
43rd March 4, 1873
March 4, 1875

Charles Hays
Seniority from March 4, 1869
(7 years, 364 days)
(retired)
44th March 4, 1875
March 4, 1877
45th March 4, 1877
March 4, 1879

William H. Forney
Seniority from March 4, 1875
(17 years, 364 days)
(retired)
46th March 4, 1879
March 4, 1881

John T. Morgan
Seniority from March 4, 1877
(30 years, 99 days)
(died)
Forney
(House)

Seniority from March 4, 1875
(17 years, 364 days)

47th March 4, 1881
March 4, 1883
48th March 4, 1883
March 4, 1885
49th March 4, 1885
March 4, 1887
50th March 4, 1887
March 4, 1889
51st March 4, 1889
March 4, 1891
52nd March 4, 1891
March 4, 1893
53rd March 4, 1893
November 5, 1894
Morgan
(Senate)

Seniority from March 4, 1877
(30 years, 99 days)


William C. Oates
Seniority from March 4, 1881
(13 years, 246 days)
(elected Alabama governor)
November 5, 1894
March 4, 1895

Joseph Wheeler[M]
Seniority from March 4, 1885
(15 years, 47 days)
(resigned)
54th March 4, 1895
March 4, 1897
55th March 4, 1897
March 4, 1899
56th March 4, 1899
April 20, 1900
April 20, 1900
March 4, 1901

John H. Bankhead
Seniority from March 4, 1887
(19 years, 364 days)
(lost renomination)
57th March 4, 1901
March 4, 1903
58th March 4, 1903
March 4, 1905
59th March 4, 1905
March 4, 1907
60th March 4, 1907
June 11, 1907

Oscar Underwood[M]
Seniority from March 4, 1897[k]
(17 years, 364 days)
(elected to Senate)
June 11, 1907
July 27, 1907

Edmund Pettus
Seniority from March 4, 1897
(10 years, 145 days)
(died)
Co-deans:
Pettus (Senate)
Underwood (House)

Seniority from March 4, 1897
(10 years, 145 days)

July 27, 1907
March 4, 1909

John H. Bankhead[C]
Seniority from June 18, 1907[e]
(12 years, 257 days)
(died)
Underwood
(House and Senate)

Seniority from March 4, 1897
(29 years, 364 days)

61st March 4, 1909
March 4, 1911
62nd March 4, 1911
March 4, 1913
63rd March 4, 1913
March 4, 1915
64th March 4, 1915
March 4, 1917

John L. Burnett
Seniority from March 4, 1899
(20 years, 70 days)
(died)
65th March 4, 1917
March 4, 1919
66th March 4, 1919
May 13, 1919
May 13, 1919
March 1, 1920

J. Thomas Heflin
Seniority from May 19, 1904[l]
(16 years, 167 days)
(elected to Senate)
March 1, 1920
November 1, 1920

Oscar Underwood[N][C]
Seniority from March 4, 1915
(11 years, 364 days)
(retired)
November 1, 1920
March 4, 1921

S. Hubert Dent Jr.
Seniority from March 4, 1909
(11 years, 364 days)
(lost renomination)
67th March 4, 1921
March 4, 1923

Edward B. Almon
Seniority from March 4, 1915[j]
(18 years, 110 days)
(died)
68th March 4, 1923
March 4, 1925
69th March 4, 1925
March 4, 1927
70th March 4, 1927
March 4, 1929

J. Thomas Heflin[C]
Seniority from November 3, 1920[m]
(10 years, 120 days)
(disqualified)
Heflin
(House and Senate)

Seniority from May 19, 1904[n]
(26 years, 288 days)

71st March 4, 1929
March 4, 1931
72nd March 4, 1931
March 4, 1933

Hugo Black
Seniority from March 4, 1927
(10 years, 168 days)
(appointed Supreme Court
associate justice
)
Almon
(House)

Seniority from March 4, 1915
(18 years, 110 days)

73rd March 4, 1933
June 22, 1933
June 22, 1933
January 3, 1935
Huddleston
(House)

Seniority from March 4, 1915
(21 years, 305 days)


George Huddleston
Seniority from March 4, 1915[j]
(21 years, 305 days)
(lost renomination)
74th January 3, 1935
January 3, 1937
75th January 3, 1937
August 19, 1937
Steagall
(House)

Seniority from March 4, 1915
(28 years, 263 days)


Henry B. Steagall
Seniority from March 4, 1915
(28 years, 263 days)
(died)
August 19, 1937
January 3, 1939

John H. Bankhead II
Seniority from March 4, 1931
(15 years, 100 days)
(died)
76th January 3, 1939
January 3, 1941
77th January 3, 1941
January 3, 1943
78th January 3, 1943
November 22, 1943
November 22, 1943
January 3, 1945
Hill
(House and Senate)

Seniority from August 14, 1923[l]
(45 years, 142 days)


Sam Hobbs
Seniority from January 3, 1935
(16 years, 0 days)
(retired)
79th January 3, 1945
June 12, 1946
June 12, 1946
January 3, 1947

J. Lister Hill[C]
Seniority from January 11, 1938[e]
(30 years, 358 days)
(retired)
80th January 3, 1947
January 3, 1949
81st January 3, 1949
January 3, 1951
82nd January 3, 1951
January 3, 1953

Frank W. Boykin
Seniority from July 30, 1935[l]
(27 years, 157 days)
(lost renomination)
83rd January 3, 1953
January 3, 1955
84th January 3, 1955
January 3, 1957
85th January 3, 1957
January 3, 1959
86th January 3, 1959
January 3, 1961
87th January 3, 1961
January 3, 1963
88th January 3, 1963
January 3, 1965

George M. Grant
Seniority from June 14, 1938[l]
(26 years, 203 days)
(lost re-election)
89th January 3, 1965
January 3, 1967

George W. Andrews
Seniority from March 14, 1944[l]
(27 years, 286 days)
(died)
90th January 3, 1967
January 3, 1969
91st January 3, 1969
January 3, 1971

John Sparkman[C]
Seniority from November 6, 1946[m]
(32 years, 58 days)
(retired)
Sparkman
(House and Senate)

Seniority from January 3, 1937
(42 years, 0 days)

92nd January 3, 1971
December 25, 1971
December 25, 1971
January 3, 1973

Robert E. Jones Jr.
Seniority from January 28, 1947[l]
(29 years, 341 days)
(retired)
93rd January 3, 1973
January 3, 1975
94th January 3, 1975
January 3, 1977
95th January 3, 1977
January 3, 1979

John H. Buchanan Jr.
Seniority from January 3, 1965[j]
(16 years, 0 days)
(lost renomination)
96th January 3, 1979
January 2, 1981

Donald Stewart
Seniority from November 8, 1978[m]
(2 years, 55 days)
(resigned)
Buchanan
(House)

Seniority from January 3, 1965
(16 years, 0 days)

January 2, 1981
January 3, 1981

Howell Heflin
Seniority from January 3, 1979
(18 years, 0 days)
(retired)
97th January 3, 1981
January 3, 1983
Co-deans:
Dickinson, Edwards
(House)

Seniority from January 3, 1965
(20 years, 0 days)

Co-deans:

Bill Dickinson,
Jack Edwards

Seniority from January 3, 1965
(20 years, 0 days)
(Edwards retired)
98th January 3, 1983
January 3, 1985
99th January 3, 1985
January 3, 1987
Dickinson
(House)

Seniority from January 3, 1965
(28 years, 0 days)


Bill Dickinson
Seniority from January 3, 1965
(28 years, 0 days)
(retired)
100th January 3, 1987
January 3, 1989
101st January 3, 1989
January 3, 1991
102nd January 3, 1991
January 3, 1993
103rd January 3, 1993
January 3, 1995
Bevill
(House)

Seniority from January 3, 1967
(30 years, 0 days)


Tom Bevill
Seniority from January 3, 1967
(30 years, 0 days)
(retired)
104th January 3, 1995
January 3, 1997
105th January 3, 1997
January 3, 1999

Richard Shelby[C]
Seniority from January 3, 1987
(36 years, 0 days)
(retired)
Shelby
(House and Senate)

Seniority from January 3, 1979
(44 years, 0 days)


Sonny Callahan
Seniority from January 3, 1985
(18 years, 0 days)
(retired)
106th January 3, 1999
January 3, 2001
107th January 3, 2001
January 3, 2003
108th January 3, 2003
January 3, 2005

Bud Cramer
Seniority from January 3, 1991
(18 years, 0 days)
(retired)
109th January 3, 2005
January 3, 2007
110th January 3, 2007
January 3, 2009
111th January 3, 2009
January 3, 2011

Spencer Bachus
Seniority from January 3, 1993
(22 years, 0 days)
(retired)
112th January 3, 2011
January 3, 2013
113th January 3, 2013
January 3, 2015
114th January 3, 2015
January 3, 2017

Robert Aderholt
Seniority from January 3, 1997
(27 years, 305 days)
(Incumbent)
115th January 3, 2017
January 3, 2019
116th January 3, 2019
January 3, 2021
117th January 3, 2021
January 3, 2023
118th January 3, 2023
present

Tommy Tuberville
Seniority from January 3, 2021
(3 years, 305 days)
(Incumbent)
Aderholt
(House)

Seniority from January 3, 1997
(27 years, 305 days)

Congress Dates Senior senator
(Seniority and tenure)
(Cause of departure)
Delegation dean
(Combined seniority
and tenure)
House dean
(Seniority and tenure)
(Cause of departure)

Alaska

[edit]
Senior members of Alaska's congressional delegation
Congress Dates Senior senator
(Seniority and tenure)
(Cause of departure)
Delegation dean
(Combined seniority
and tenure)
House dean[O]
(Seniority and tenure)
(Cause of departure)
86th January 3, 1959
January 3, 1961

Bob Bartlett[C]
Seniority from January 3, 1959[o]
(9 years, 343 days)

(died)
Bartlett
(Senate)

Seniority from January 3, 1959[p]
(9 years, 343 days)


Ralph Rivers
Seniority from January 3, 1959
(7 years, 361 days)
(resigned)
87th January 3, 1961
January 3, 1963
88th January 3, 1963
January 3, 1965
89th January 3, 1965
December 30, 1966
December 30, 1966
January 3, 1967
Vacant
90th January 3, 1967
December 11, 1968

Howard Pollock
Seniority from January 3, 1967
(4 years, 0 days)
(ran for Alaska governor)
December 11, 1968
January 3, 1969

Ernest Gruening
Seniority from January 3, 1959
(10 years, 0 days)
(lost re-election)
Gruening
(Senate)

Seniority from January 3, 1959
(10 years, 0 days)

91st January 3, 1969
January 3, 1971

Ted Stevens[P]
Seniority from December 24, 1968[e]
(40 years, 10 days)
(lost re-election)
Pollock
(House)

Seniority from January 3, 1967
(4 years, 0 days)

92nd January 3, 1971
December 29, 1972
Stevens
(Senate)

Seniority from December 24, 1968
(40 years, 10 days)


Nick Begich
Seniority from January 3, 1971
(1 year, 361 days)
(declared dead)[4]
December 29, 1972
January 3, 1973
Vacant
93rd January 3, 1973
March 6, 1973
March 6, 1973
January 3, 1975

Don Young[Q]
Seniority from March 6, 1973[l]
(49 years, 12 days)
(died)
94th January 3, 1975
January 3, 1977
95th January 3, 1977
January 3, 1979
96th January 3, 1979
January 3, 1981
97th January 3, 1981
January 3, 1983
98th January 3, 1983
January 3, 1985
99th January 3, 1985
January 3, 1987
100th January 3, 1987
January 3, 1989
101st January 3, 1989
January 3, 1991
102nd January 3, 1991
January 3, 1993
103rd January 3, 1993
January 3, 1995
104th January 3, 1995
January 3, 1997
105th January 3, 1997
January 3, 1999
106th January 3, 1999
January 3, 2001
107th January 3, 2001
January 3, 2003
108th January 3, 2003
January 3, 2005
109th January 3, 2005
January 3, 2007
110th January 3, 2007
January 3, 2009
111th January 3, 2009
January 3, 2011

Lisa Murkowski
Seniority from December 20, 2002[e]
(21 years, 319 days)
(Incumbent)
Young
(House)

Seniority from March 6, 1973
(49 years, 12 days)

112th January 3, 2011
January 3, 2013
113th January 3, 2013
January 3, 2015
114th January 3, 2015
January 3, 2017
115th January 3, 2017
January 3, 2019
116th January 3, 2019
January 3, 2021
117th January 3, 2021
March 18, 2022
March 18, 2022
September 13, 2022
Murkowski
(Senate)

Seniority from December 20, 2002
(21 years, 319 days)

Vacant
September 13, 2022
January 3, 2023

Mary Peltola
Seniority from August 16, 2022[l]
(2 years, 79 days)
(Incumbent)
118th January 3, 2023
present
Congress Dates Senior senator
(Seniority and tenure)
(Cause of departure)
Delegation dean
(Combined seniority
and tenure)
House dean[O]
(Seniority and tenure)
(Cause of departure)

Arizona

[edit]
Senior members of Arizona's congressional delegation
Congress Dates Senior senator
(Seniority and tenure)
(Cause of departure)
Delegation dean(s)
(Combined seniority
and tenure)
House dean(s)
(Seniority and tenure)
(Cause of departure)
62nd February 14, 1912
February 19, 1912
Vacant
(not yet elected)
None Vacant
(not yet elected)
February 19, 1912
March 27, 1912

Carl Hayden[D]
Seniority from February 19, 1912
(15 years, 12 days)
(elected to Senate)
March 27, 1912
March 4, 1913

Marcus A. Smith[E]
Seniority from March 27, 1912[q]
(8 years, 341 days)
(lost re-election)
Hayden
(House and Senate)

Seniority from February 19, 1912
(56 years, 319 days)

63rd March 4, 1913
March 4, 1915
64th March 4, 1915
March 4, 1917
65th March 4, 1917
March 4, 1919
66th March 4, 1919
March 4, 1921
67th March 4, 1921
March 4, 1923

Henry F. Ashurst
Seniority from March 27, 1912
(28 years, 282 days)
(lost renomination)[5]
68th March 4, 1923
March 4, 1925
69th March 4, 1925
March 4, 1927
70th March 4, 1927
March 4, 1929

Lewis W. Douglas[D]
Seniority from March 4, 1927
(6 years, 0 days)
(appointed OMB director)
71st March 4, 1929
March 4, 1931
72nd March 4, 1931
March 4, 1933
73rd March 4, 1933
October 3, 1933
Vacant
October 3, 1933
January 3, 1935

Isabella Greenway[D]
Seniority from October 3, 1933[l]
(3 years, 92 days)
(retired)
74th January 3, 1935
January 3, 1937
75th January 3, 1937
January 3, 1939

John R. Murdock[R]
Seniority from January 3, 1937
(16 years, 0 days)
(lost re-election)
76th January 3, 1939
January 3, 1941
77th January 3, 1941
January 3, 1943

Carl Hayden[S][C]
Seniority from March 4, 1927
(41 years, 305 days)
(retired)
78th January 3, 1943
January 3, 1945
79th January 3, 1945
January 3, 1947
80th January 3, 1947
January 3, 1949
81st January 3, 1949
January 3, 1951
82nd January 3, 1951
January 3, 1953
83rd January 3, 1953
January 3, 1955

Harold Patten
Seniority from January 3, 1949
(6 years, 0 days)
(retired)
84th January 3, 1955
January 3, 1957

John J. Rhodes[T]
Seniority from January 3, 1953
(30 years, 0 days)
(retired)
85th January 3, 1957
January 3, 1959
86th January 3, 1959
January 3, 1961
87th January 3, 1961
January 3, 1963
88th January 3, 1963
January 3, 1965
89th January 3, 1965
January 3, 1967
90th January 3, 1967
January 3, 1969
91st January 3, 1969
January 3, 1971

Paul Fannin
Seniority from January 3, 1965
(12 years, 0 days)
(retired)
Rhodes
(House)

Seniority from January 3, 1953
(30 years, 0 days)

92nd January 3, 1971
January 21, 1971
January 21, 1971
January 3, 1973
93rd January 3, 1973
January 3, 1975
94th January 3, 1975
January 3, 1977
95th January 3, 1977
January 3, 1979

Barry Goldwater[L]
Seniority from January 3, 1969
(18 years, 0 days)
(retired)
96th January 3, 1979
January 3, 1981
97th January 3, 1981
January 3, 1983
98th January 3, 1983
January 3, 1985
Udall
(House)

Seniority from May 2, 1961
(30 years, 2 days)


Mo Udall
Seniority from May 2, 1961[l]
(30 years, 2 days)
(resigned)
99th January 3, 1985
January 3, 1987
100th January 3, 1987
January 3, 1989

Dennis DeConcini
Seniority from January 3, 1977
(18 years, 0 days)
(retired)
101st January 3, 1989
January 3, 1991
102nd January 3, 1991
May 4, 1991
May 4, 1991
January 3, 1993
Co-deans:
DeConcini (Senate)
Stump (House)

Seniority from January 3, 1977
(18 years, 0 days)


Bob Stump
Seniority from January 3, 1977
(26 years, 0 days)
(retired)
103rd January 3, 1993
January 3, 1995
104th January 3, 1995
January 3, 1997

John McCain[C]
Seniority from January 3, 1987
(31 years, 234 days)
(died)
Stump
(House)

Seniority from January 3, 1977
(26 years, 0 days)

105th January 3, 1997
January 3, 1999
106th January 3, 1999
January 3, 2001
107th January 3, 2001
January 3, 2003
108th January 3, 2003
January 3, 2005
McCain
(House and Senate)

Seniority from January 3, 1983
(35 years, 234 days)


Jim Kolbe
Seniority from January 3, 1985
(22 years, 0 days)
(retired)
109th January 3, 2005
January 3, 2007
110th January 3, 2007
January 3, 2009

Ed Pastor
Seniority from October 3, 1991[l]
(23 years, 92 days)
(retired)
111th January 3, 2009
January 3, 2011
112th January 3, 2011
January 3, 2013
113th January 3, 2013
January 3, 2015
114th January 3, 2015
January 3, 2017
Co-deans:

Trent Franks (R),
Raúl Grijalva (D)
Seniority from January 3, 2003
(14 years, 339 days)
(Franks resigned)[6]
115th January 3, 2017
December 8, 2017
December 8, 2017
August 25, 2018

Raúl Grijalva
Seniority from January 3, 2003
(21 years, 305 days)
(Incumbent)
August 25, 2018
January 3, 2019

Jeff Flake[C]
Seniority from January 3, 2013
(6 years, 0 days)
(retired)
Flake
(House and Senate)

Seniority from January 3, 2001
(18 years, 0 days)

116th January 3, 2019
January 3, 2021

Kyrsten Sinema[U][C]
Seniority from January 3, 2019[r]
(5 years, 305 days)
(Incumbent)
Grijalva
(House)

Seniority from January 3, 2003
(21 years, 305 days)

117th January 3, 2021
January 3, 2023
118th January 3, 2023
present
Congress Dates Senior senator
(Seniority and tenure)
(Cause of departure)
Delegation dean(s)
(Combined seniority
and tenure)
House dean(s)
(Seniority and tenure)
(Cause of departure)

Arkansas

[edit]
Senior members of Arkansas's congressional delegation (1893–present)
Congress Dates Senior senator
(Seniority and tenure)
(Cause of departure)
Delegation dean
(Combined seniority
and tenure)
House dean
(Seniority and tenure)
(Cause of departure)
51st March 4, 1889
September 5, 1890

James K. Jones[V][C]
Seniority from March 4, 1885
(17 years, 364 days)
(lost re-election)
Breckinridge
(House)

Seniority from March 4, 1883
(7 years, 185 days)


Clifton R. Breckinridge
Seniority from March 4, 1883[j]
(7 years, 185 days)
(election contested)[7]
September 5, 1890
March 4, 1891
Co-deans:
Peel, Rogers
(House)

Seniority from March 4, 1883
(7 years, 364 days)

Co-deans:

Samuel W. Peel,
John H. Rogers

Seniority from March 4, 1883
(7 years, 364 days)
(Rogers retired)
52nd March 4, 1891
March 4, 1893
Peel
(House)

Seniority from March 4, 1883
(9 years, 364 days)


Samuel W. Peel
Seniority from March 4, 1883
(9 years, 364 days)
(lost renomination)
53rd March 4, 1893
March 4, 1895
Jones
(Senate)

Seniority from March 4, 1885
(17 years, 364 days)


Thomas C. McRae
Seniority from December 7, 1885[l]
(17 years, 86 days)
(retired)
54th March 4, 1895
March 4, 1897
55th March 4, 1897
March 4, 1899
56th March 4, 1899
March 4, 1901
57th March 4, 1901
March 4, 1903
58th March 4, 1903
March 4, 1905

James H. Berry
Seniority from March 20, 1885[d]
(21 years, 348 days)
(lost re-election)
Berry
(Senate)

Seniority from March 20, 1885
(21 years, 348 days)


Hugh A. Dinsmore
Seniority from March 4, 1893
(11 years, 364 days)
(lost renomination)
59th March 4, 1905
January 14, 1907

John S. Little
Seniority from December 3, 1894[l]
(12 years, 42 days)
(elected Arkansas governor)
January 14, 1907
March 4, 1907

Stephen Brundidge Jr.
Seniority from March 4, 1897
(11 years, 364 days)
(ran for Arkansas governor)
60th March 4, 1907
March 4, 1909

James P. Clarke[W]
Seniority from March 4, 1903
(13 years, 211 days)
(died)
Brundidge
(House)

Seniority from March 4, 1897
(11 years, 364 days)

61st March 4, 1909
March 4, 1911
Reid
(House)

Seniority from March 4, 1901
(9 years, 364 days)


Charles C. Reid
Seniority from March 4, 1901
(9 years, 364 days)
(retired)
62nd March 4, 1911
January 14, 1913
Co-deans:
Clarke (Senate)
Macon, Robinson (House)

Seniority from March 4, 1903
(9 years, 316 days)

Co-deans:

Robert B. Macon,
Joseph T. Robinson

Seniority from March 4, 1903
(9 years, 316 days)
(Robinson elected Arkansas
governor
)
January 14, 1913
March 4, 1913
Co-deans:
Clarke (Senate)
Macon (House)

Seniority from March 4, 1903
(9 years, 316 days)


Robert B. Macon
Seniority from March 4, 1903
(9 years, 364 days)
(lost renomination)
63rd March 4, 1913
March 4, 1915
Clarke
(Senate)

Seniority from March 4, 1903
(13 years, 211 days)


John C. Floyd
Seniority from March 4, 1905
(9 years, 364 days)
(retired)
64th March 4, 1915
October 1, 1916

William A. Oldfield
Seniority from March 4, 1909
(19 years, 260 days)
(died)
October 1, 1916
March 4, 1917

Joseph T. Robinson[X][C]
Seniority from March 10, 1913[d]
(24 years, 126 days)
(died)
Oldfield
(House)

Seniority from March 4, 1909
(19 years, 260 days)

65th March 4, 1917
March 4, 1919
66th March 4, 1919
March 4, 1921
67th March 4, 1921
March 4, 1923
68th March 4, 1923
March 4, 1925
69th March 4, 1925
March 4, 1927
70th March 4, 1927
November 19, 1928
November 19, 1928
March 4, 1929
Co-deans:
T. Caraway[Y] (House and Senate)
Wingo (House)

Seniority from March 4, 1913
(17 years, 231 days)


Otis Wingo
Seniority from March 4, 1913
(17 years, 231 days)
(died)
71st March 4, 1929
October 21, 1930
October 21, 1930
March 4, 1931
T. Caraway[Y]
(House and Senate)

Seniority from March 4, 1913
(18 years, 247 days)

Co-deans:

William J. Driver,
Tilman B. Parks

Seniority from March 4, 1921
(15 years, 305 days)
(Parks retired)
72nd March 4, 1931
November 6, 1931
November 6, 1931
March 4, 1933
Robinson[Z]
(Senate)

Seniority from March 10, 1913
(24 years, 126 days)

73rd March 4, 1933
January 3, 1935
74th January 3, 1935
January 3, 1937
75th January 3, 1937
July 14, 1937

William J. Driver
Seniority from March 4, 1921
(17 years, 305 days)
(lost renomination)
July 14, 1937
January 3, 1939

Hattie Caraway
Seniority from November 13, 1931[e]
(13 years, 51 days)
(lost renomination)
Driver
(House)

Seniority from March 4, 1921
(17 years, 305 days)

76th January 3, 1939
January 13, 1939
Miller[Y]
(House and Senate)

Seniority from March 4, 1931
(10 years, 27 days)


William B. Cravens[M]
Seniority from March 4, 1933
(5 years, 315 days)
(died)
January 13, 1939
January 3, 1941

David D. Terry
Seniority from December 19, 1933[l]
(9 years, 15 days)
(ran for Senate)
77th January 3, 1941
March 31, 1941
March 31, 1941
January 3, 1943
H. Caraway
(Senate)

Seniority from November 13, 1931
(13 years, 51 days)

78th January 3, 1943
January 3, 1945

Ezekiel C. Gathings
Seniority from January 3, 1939[j]
(22 years, 43 days)
(co-dean after Norrell's death)
79th January 3, 1945
January 3, 1947

John L. McClellan[AA][C]
Seniority from January 3, 1943
(34 years, 329 days)
(died)
Gathings
(House)

Seniority from January 3, 1939
(22 years, 43 days)

80th January 3, 1947
January 3, 1949
81st January 3, 1949
January 3, 1951
82nd January 3, 1951
January 3, 1953
83rd January 3, 1953
January 3, 1955
84th January 3, 1955
January 3, 1957
85th January 3, 1957
January 3, 1959
86th January 3, 1959
January 3, 1961
87th January 3, 1961
February 15, 1961
February 15, 1961
January 3, 1963
Co-deans:
Gathings, Mills
(House)

Seniority from January 3, 1939
(30 years, 0 days)

Co-deans:

Ezekiel C. Gathings,
Wilbur Mills

Seniority from January 3, 1939
(30 years, 0 days)
(Gathings retired)
88th January 3, 1963
January 3, 1965
89th January 3, 1965
January 3, 1967
90th January 3, 1967
January 3, 1969
91st January 3, 1969
January 3, 1971
Mills
(House)

Seniority from January 3, 1939
(38 years, 0 days)


Wilbur Mills
Seniority from January 3, 1939
(38 years, 0 days)
(retired)
92nd January 3, 1971
January 3, 1973
93rd January 3, 1973
January 3, 1975
94th January 3, 1975
January 3, 1977
95th January 3, 1977
November 28, 1977
McClellan
(Senate)

Seniority from January 3, 1943
(34 years, 329 days)


John Paul Hammerschmidt
Seniority from January 3, 1967
(26 years, 0 days)
(retired)
November 28, 1977
January 3, 1979

Dale Bumpers
Seniority from January 3, 1975
(24 years, 0 days)
(retired)
Hammerschmidt
(House)

Seniority from January 3, 1967
(26 years, 0 days)

96th January 3, 1979
January 3, 1981
97th January 3, 1981
January 3, 1983
98th January 3, 1983
January 3, 1985
99th January 3, 1985
January 3, 1987
100th January 3, 1987
January 3, 1989
101st January 3, 1989
January 3, 1991
102nd January 3, 1991
January 3, 1993
103rd January 3, 1993
January 3, 1995
Bumpers
(Senate)

Seniority from January 3, 1975
(24 years, 0 days)


Ray Thornton[M]
Seniority from January 3, 1991
(5 years, 364 days)
(elected Arkansas Supreme
Court justice
)
104th January 3, 1995
January 1, 1997
January 1, 1997
January 3, 1997

Jay Dickey
Seniority from January 3, 1993
(8 years, 0 days)
(lost re-election)
105th January 3, 1997
January 3, 1999
106th January 3, 1999
January 3, 2001

Tim Hutchinson[C]
Seniority from January 3, 1997
(6 years, 0 days)
(lost re-election)
Co-deans:
Hutchinson (House and Senate)
Dickey (House)

Seniority from January 3, 1993
(8 years, 0 days)

107th January 3, 2001
August 6, 2001
Hutchinson
(House and Senate)

Seniority from January 3, 1993
(10 years, 0 days)


Marion Berry
Seniority from January 3, 1997[j]
(4 years, 215 days)
(co-dean after Hutchinson
appointed DEA administrator)
August 6, 2001
January 3, 2003
Co-deans:

Marion Berry,
Vic Snyder

Seniority from January 3, 1997
(14 years, 0 days)
(both retired)
108th January 3, 2003
January 3, 2005

Blanche Lincoln[C]
Seniority from January 3, 1999
(12 years, 0 days)
(lost re-election)
Co-deans:
Berry, Snyder
(House)

Seniority from January 3, 1997
(14 years, 0 days)

109th January 3, 2005
January 3, 2007
110th January 3, 2007
January 3, 2009
111th January 3, 2009
January 3, 2011
112th January 3, 2011
January 3, 2013

Mark Pryor
Seniority from January 3, 2003
(12 years, 0 days)
(lost re-election)
Ross
(House)

Seniority from January 3, 2001
(12 years, 0 days)


Mike Ross
Seniority from January 3, 2001
(12 years, 0 days)
(ran for Arkansas governor)
113th January 3, 2013
January 3, 2015
Boozman
(House and Senate)

Seniority from November 20, 2001[l]
(22 years, 349 days)


Rick Crawford
Seniority from January 3, 2011[j]
(4 years, 0 days)
(co-dean after Griffin elected
Arkansas lieutenant governor
)
114th January 3, 2015
January 3, 2017

John Boozman[C]
Seniority from January 3, 2011
(13 years, 305 days)
(Incumbent)
Co-deans:

Rick Crawford,
Steve Womack

Seniority from January 3, 2011
(13 years, 305 days)
(Incumbent)
115th January 3, 2017
January 3, 2019
116th January 3, 2019
January 3, 2021
117th January 3, 2021
January 3, 2023
118th January 3, 2023
present
Congress Dates Senior senator
(Seniority and tenure)
(Cause of departure)
Delegation dean
(Combined seniority
and tenure)
House dean
(Seniority and tenure)
(Cause of departure)

California (TO CHECK)

[edit]
Senior members of California's congressional delegation (1885–present)
Congress Dates Senior senator
(Seniority and tenure)
(Cause of departure)
Delegation dean
(Combined seniority
and tenure)
House dean
(Seniority and tenure)
(Cause of departure)
49th March 4, 1885
March 8, 1886

John F. Miller
Seniority from March 4, 1881
(5 years, 4 days)
(died)
Miller
(Senate)

Seniority from March 4, 1881
(5 years, 4 days)


Barclay Henley
Seniority from March 4, 1883
(3 years, 364 days)
(retired)
March 8, 1886
March 4, 1887

Leland Stanford
Seniority from March 4, 1885
(8 years, 109 days)
(died)
Henley
(House)

Seniority from March 4, 1883
(3 years, 364 days)

50th March 4, 1887
March 4, 1889
Co-deans:
Stanford (Senate)
Felton (House)

Seniority from March 4, 1885
(3 years, 364 days)


Charles N. Felton
Seniority from March 4, 1885[j]
(3 years, 364 days)
(retired)
51st March 4, 1889
March 4, 1891
Co-deans:
Stanford (Senate)
McKenna, Morrow (House)

Seniority from March 4, 1885
(5 years, 364 days)

Co-deans:

Joseph McKenna,
William W. Morrow

Seniority from March 4, 1885
(5 years, 364 days)
(Morrow retired)
52nd March 4, 1891
March 28, 1892
Co-deans:
Stanford (Senate)
McKenna (House)

Seniority from March 4, 1885
(7 years, 24 days)


Joseph McKenna
Seniority from March 4, 1885
(7 years, 24 days)
(appointed appeals court
judge
)
March 28, 1892
March 4, 1893
Stanford
(Senate)

Seniority from March 4, 1885
(8 years, 109 days)


Thomas J. Geary
Seniority from December 9, 1890[l]
(4 years, 84 days)
(lost re-election)
53rd March 4, 1893
June 21, 1893
June 21, 1893
March 4, 1895

Stephen M. White
Seniority from March 4, 1893
(5 years, 364 days)
(retired)
Geary
(House)

Seniority from December 9, 1890
(4 years, 84 days)

54th March 4, 1895
March 4, 1897
Co-deans:
Bowers, Loud
(House)

Seniority from March 4, 1891
(5 years, 364 days)

Co-deans:

William W. Bowers,
Eugene F. Loud

Seniority from March 4, 1891
(5 years, 364 days)
(Bowers lost re-election)
55th March 4, 1897
March 4, 1899
Loud
(House)

Seniority from March 4, 1891
(11 years, 364 days)


Eugene F. Loud
Seniority from March 4, 1891
(11 years, 364 days)
(lost re-election)
56th March 4, 1899
March 4, 1901

George C. Perkins
Seniority from July 26, 1893[e]
(21 years, 220 days)
(retired)
57th March 4, 1901
March 4, 1903
58th March 4, 1903
July 1, 1904
Perkins
(Senate)

Seniority from July 26, 1893
(21 years, 220 days)

Co-deans:

Victor H. Metcalf,
James C. Needham

Seniority from March 4, 1899
(5 years, 119 days)
(Metcalf appointed Secretary of
Commerce and Labor
)
July 1, 1904
March 4, 1905

James C. Needham
Seniority from March 4, 1899
(13 years, 364 days)
(lost re-election)
59th March 4, 1905
March 4, 1907
60th March 4, 1907
March 4, 1909
61st March 4, 1909
March 4, 1911
62nd March 4, 1911
March 4, 1913
63rd March 4, 1913
March 4, 1915

Joseph R. Knowland
Seniority from November 8, 1904[l]
(10 years, 115 days)
(ran for Senate)
64th March 4, 1915
March 4, 1917

John D. Works
Seniority from March 4, 1911
(5 years, 364 days)
(retired)
Kahn
(House)

Seniority from March 4, 1905
(19 years, 289 days)


Julius Kahn[M]
Seniority from March 4, 1905[k]
(19 years, 289 days)
(died)
65th March 4, 1917
March 4, 1919

James D. Phelan
Seniority from March 4, 1915
(5 years, 364 days)
(lost re-election)
66th March 4, 1919
March 4, 1921
67th March 4, 1921
March 4, 1923

Hiram Johnson
Seniority from March 16, 1917[s]
(28 years, 143 days)
(died)
68th March 4, 1923
December 18, 1924
December 18, 1924
March 4, 1925
Raker
(House)

Seniority from March 4, 1911
(14 years, 324 days)


John E. Raker
Seniority from March 4, 1911
(14 years, 324 days)
(died)
69th March 4, 1925
January 22, 1926
January 22, 1926
March 4, 1927
Curry
(House)

Seniority from March 4, 1913
(17 years, 220 days)


Charles F. Curry
Seniority from March 4, 1913
(17 years, 220 days)
(died)
70th March 4, 1927
March 4, 1929
71st March 4, 1929
October 10, 1930
October 10, 1930
March 4, 1931
Lea
(House)

Seniority from March 4, 1917
(31 years, 305 days)


Clarence F. Lea
Seniority from March 4, 1917
(31 years, 305 days)
(retired)
72nd March 4, 1931
March 4, 1933
73rd March 4, 1933
January 3, 1935
74th January 3, 1935
January 3, 1937
75th January 3, 1937
January 3, 1939
76th January 3, 1939
January 3, 1941
77th January 3, 1941
January 3, 1943
78th January 3, 1943
January 3, 1945
79th January 3, 1945
August 6, 1945
August 6, 1945
January 3, 1947

Sheridan Downey
Seniority from January 3, 1939
(11 years, 331 days)
(resigned)
80th January 3, 1947
January 3, 1949
81st January 3, 1949
September 10, 1949
Welch
(House)

Seniority from August 31, 1926
(23 years, 10 days)


Richard J. Welch
Seniority from August 31, 1926[l]
(23 years, 10 days)
(died)
September 10, 1949
November 30, 1950
Sheppard
(House)

Seniority from January 3, 1937
(28 years, 0 days)


Harry R. Sheppard
Seniority from January 3, 1937
(28 years, 0 days)
(retired)
November 30, 1950
January 3, 1951

William Knowland[AB]
Seniority from August 26, 1945[e]
(13 years, 130 days)
(ran for California governor)
82nd January 3, 1951
January 3, 1953
83rd January 3, 1953
January 3, 1955
84th January 3, 1955
January 3, 1957
85th January 3, 1957
January 3, 1959
86th January 3, 1959
January 3, 1961

Thomas Kuchel
Seniority from January 2, 1953[e]
(16 years, 1 day)
(lost renomination)
87th January 3, 1961
January 3, 1963
88th January 3, 1963
January 3, 1965
89th January 3, 1965
January 3, 1967
King
(House)

Seniority from August 25, 1942
(26 years, 131 days)


Cecil R. King
Seniority from August 25, 1942[l]
(26 years, 131 days)
(retired)
90th January 3, 1967
January 3, 1969
91st January 3, 1969
January 1, 1971

George Murphy
Seniority from January 1, 1969[e]
(5 years, 363 days)
(resigned)
Holifield
(House)

Seniority from January 3, 1943
(31 years, 362 days)


Chet Holifield
Seniority from January 3, 1943
(31 years, 362 days)
(resigned)
January 1, 1971
January 3, 1971

Alan Cranston
Seniority from January 3, 1969
(24 years, 0 days)
(retired)
92nd January 3, 1971
January 3, 1973
93rd January 3, 1973
December 31, 1974
December 31, 1974
January 3, 1975
Co-deans:
Moss, Wilson
(House)

Seniority from January 3, 1953
(25 years, 362 days)

Co-deans:

John E. Moss (D),
Bob Wilson (R)
Seniority from January 3, 1953
(25 years, 362 days)
(Moss resigned)
94th January 3, 1975
January 3, 1977
95th January 3, 1977
December 31, 1978
December 31, 1978
January 3, 1979
Wilson
(House)

Seniority from January 3, 1953
(28 years, 0 days)


Bob Wilson
Seniority from January 3, 1953
(28 years, 0 days)
(retired)
96th January 3, 1979
January 3, 1981
97th January 3, 1981
January 3, 1983
Edwards
(House)

Seniority from January 3, 1963
(28 years, 0 days)


Don Edwards
Seniority from January 3, 1963[j]
(28 years, 0 days)
(co-dean after Hawkins's
retirement)
98th January 3, 1983
January 3, 1985
99th January 3, 1985
January 3, 1987
100th January 3, 1987
January 3, 1989
101st January 3, 1989
January 3, 1991
102nd January 3, 1991
January 3, 1993
Co-deans:
Edwards, Roybal
(House)

Seniority from January 3, 1963
(30 years, 0 days)

Co-deans:

Don Edwards,
Edward R. Roybal

Seniority from January 3, 1963
(30 years, 0 days)
(Roybal retired)
103rd January 3, 1993
January 3, 1995

Dianne Feinstein
Seniority from November 4, 1992[m]
(30 years, 329 days)
(died)
Edwards
(House)

Seniority from January 3, 1963
(32 years, 0 days)


Don Edwards
Seniority from January 3, 1963
(32 years, 0 days)
(retired)
104th January 3, 1995
January 3, 1997
Dellums
(House)

Seniority from January 3, 1971
(27 years, 34 days)


Ron Dellums
Seniority from January 3, 1971
(27 years, 34 days)
(resigned)
105th January 3, 1997
February 6, 1998
February 6, 1998
January 3, 1999
Brown
(House)

Seniority from January 3, 1973[k]
(26 years, 193 days)


George Brown Jr.[M]
Seniority from January 3, 1973[k]
(26 years, 193 days)
(died)
106th January 3, 1999
July 15, 1999
July 15, 1999
January 3, 2001
Stark
(House)

Seniority from January 3, 1973
(40 years, 0 days)


Pete Stark
Seniority from January 3, 1973
(40 years, 0 days)
(lost re-election)
107th January 3, 2001
January 3, 2003
108th January 3, 2003
January 3, 2005
109th January 3, 2005
January 3, 2007
110th January 3, 2007
January 3, 2009
111th January 3, 2009
January 3, 2011
112th January 3, 2011
January 3, 2013
113th January 3, 2013
January 3, 2015
Co-deans:
Miller, Waxman
(House)

Seniority from January 3, 1975
(40 years, 0 days)

Co-deans:

George Miller,
Henry Waxman

Seniority from January 3, 1975
(40 years, 0 days)
(both retired)
114th January 3, 2015
January 3, 2017
Pelosi
(House)

Seniority from June 2, 1987
(37 years, 154 days)


Nancy Pelosi[AC]
Seniority from June 2, 1987[l]
(37 years, 154 days)
(Incumbent)
115th January 3, 2017
January 3, 2019
116th January 3, 2019
January 3, 2021
117th January 3, 2021
January 3, 2023
118th January 3, 2023
September 29, 2023
September 29, 2023
present

Alex Padilla
Seniority from January 18, 2021[e]
(3 years, 290 days)
(Incumbent)
Congress Dates Senior senator
(Seniority and tenure)
(Cause of departure)
Delegation dean
(Combined seniority
and tenure)
House dean
(Seniority and tenure)
(Cause of departure)

References

[edit]
  1. ^ "FITZPATRICK, Benjamin (1802 – 1869)". Biographical Directory of the United States Congress. Retrieved January 13, 2024.
  2. ^ a b c d e "Chapter 7 § 2. Seniority and Derivative Rights". Deschler's Precedents, Volume 2 (PDF). U.S. Government Publishing Office. January 1, 1994. p. 670. Retrieved November 5, 2023.
  3. ^ "For Alaska's first senators, an epic battle of ego came down to a coin flip". Juneau Empire. November 1, 2021. Retrieved April 27, 2022.
  4. ^ "BEGICH, Nicholas Joseph (1932 – 1972)". Biographical Directory of the United States Congress. Retrieved September 6, 2024.
  5. ^ "ASHURST, Henry Fountain (1874 – 1962)". Biographical Directory of the United States Congress. Retrieved September 9, 2024.
  6. ^ "FRANKS, Trent (1957 – )". Biographical Directory of the United States Congress. Retrieved September 9, 2024.
  7. ^ "BRECKINRIDGE, Clifton Rodes (1846 – 1932)". Biographical Directory of the United States Congress. Retrieved March 31, 2024.

Footnotes (positional)

[edit]
  1. ^ Dean of the Senate from 1833 to 1844; President pro tempore from 1836 to 1841
  2. ^ Elected as Democratic-Republican from 1819 to 1825; as Jacksonian Democrat from 1825 to 1837
  3. ^ a b c d e f g h i j k l m n o p q r s Senator who previously served in the House of Representatives
  4. ^ a b c d Sole representative (at-large district)
  5. ^ a b Former non-voting delegate to the House of Representatives
  6. ^ Elected as Democratic-Republican until 1825
  7. ^ Dean of the House from 1843 to 1844
  8. ^ Elected as Nullifier from 1833 to 1837
  9. ^ Second time; previously served non-consecutive term(s) in the Senate
  10. ^ President pro tempore from 1850 to 1852
  11. ^ President pro tempore from 1857 to February 1860, and June to December 1860
  12. ^ a b Previously served non-consecutive term(s) in the Senate
  13. ^ a b c d e f Previously served non-consecutive term(s) in the House
  14. ^ Senate Democratic Leader from 1920 to 1923
  15. ^ a b As an at-large congressional district, Alaska has been represented by one member in the House of Representatives since statehood.
  16. ^ Various positions:
  17. ^ Dean of the House from 2017 to 2022
  18. ^ Sole representative (at-large district) until redistricting in 1942 House elections
  19. ^ President pro tempore and Dean of the Senate from 1957 to 1969
  20. ^ House Republican Leader from 1973 to 1981
  21. ^ Democrat until 2022
  22. ^ Senate Democratic Leader from 1899 to 1903
  23. ^ President pro tempore from 1913 to 1916
  24. ^ Senate Democratic Leader from 1923 to 1937
  25. ^ a b c as junior senator
  26. ^ Second time
  27. ^ Dean of the Senate from 1975 to 1977 (alongside James Eastland)
  28. ^ Senate Republican Leader from 1953 to 1959
  29. ^ House Democratic Leader from 2003 to 2023; Speaker of the House from 2007 to 2011, 2019 to 2023

Footnotes (seniority)

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  1. ^ Seniority over John Williams Walker due to past service as a member of the House of Representatives from North Carolina
  2. ^ Seniority over John Williams Walker and John Crowell due to past service as a voting member of the House of Representatives from North Carolina
  3. ^ Preceding elections involved turnover of all sitting incumbents; incoming officeholders share a seniority date with no distinguishing aspects
  4. ^ a b c d Senator elected by state legislature intra-term prior to ratification of Seventeenth Amendment; seniority calculated from election date (if different from date the seat was filled)
  5. ^ a b c d e f g h i j k l Senator appointed to fill intra-term vacancy; seniority calculated from date of appointment
  6. ^ De jure; break in term from March 4, 1855 to November 26, 1855 due to state legislature's failure to elect
  7. ^ Seniority over Willard Warner due to surname coming first alphabetically
  8. ^ All newly-seated post-Civil War officeholders share seniority date of July 21, 1868
  9. ^ All newly-seated members shared seniority until Francis William Kellogg was elected on July 22, 1868
  10. ^ a b c d e f g h i j Shares seniority date with more than two other Representatives (thus unable to count as co-deans); credited as sole dean due to surname coming first alphabetically
  11. ^ a b c d Shares seniority date with other officeholder(s); credited as sole dean by past non-consecutive terms in Congress
  12. ^ a b c d e f g h i j k l m n o p q r s t Representative elected to fill vacancy; seniority calculated from date of special election (if different from date the seat was filled)[2] Cite error: The named reference "housevacancy" was defined multiple times with different content (see the help page).
  13. ^ a b c d Senator elected to fill intra-term vacancy after ratification of the Seventeenth Amendment; seniority calculated from date the individual assumed office
  14. ^ For the purposes of this list, the one-day gap between Heflin's resignation from the House and his election to the Senate (November 1 – November 3, 1920) is ignored.
  15. ^ Seniority over Ernest Gruening due to tenure as delegate to the House of Representatives from Alaska Territory; resulting dispute decided by coin flip[3]
  16. ^ Bartlett had seniority over Ernest Gruening and Ralph Rivers due to his tenure as a non-voting House delegate from 1945 to 1959. The latter two served as Alaska's shadow senator and shadow representative respectively; neither office was officially recognized by Congress and thus did not count as congressional service.
  17. ^ Seniority over Henry F. Ashurst due to tenure as delegate to the House of Representatives from Arizona Territory
  18. ^ Seniority over Martha McSally due to longer tenure in the House of Representatives (six years) compared to McSally (four years)
  19. ^ Seated late by virtue of holding other political, governmental, or judicial office

Bibliography

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