Rank
|
Senator (party-state)
|
Seniority date
|
Other factors
|
1
|
Walter F. George (D-GA)
|
November 22, 1922
|
2
|
Carl Hayden (D-AZ)
|
March 4, 1927
|
Former Representative by Arizona (15 years)
|
3
|
Richard Russell, Jr. (D-GA)
|
January 12, 1933
|
Former Governor of Georgia
|
4
|
Harry F. Byrd, Sr. (D-VA)
|
March 4, 1933
|
Former Governor of Virgínia
|
5
|
James Murray (D-MT)
|
November 7, 1934
|
6
|
Dennis Chavez (D-NM)
|
May 11, 1935
|
Former United States Representative from New Mexico (4 years)
|
7
|
Theodore F. Green (D-RI)
|
January 3, 1937
|
Former Governor, Rhode Island 37th in population (1930)
|
8
|
Styles Bridges (R-NH)
|
Former Governor, 41st in population (1930)
|
9
|
Allen J. Ellender (D-LA)
|
10
|
Joseph L. Hill (D-AL)
|
January 11, 1938
|
Former United States Representative from Alabama (15 years)
|
11
|
Alexander Wiley (R-WI)
|
January 3, 1939
|
12
|
William Langer (R-ND)
|
January 3, 1941
|
Former Governor of North Dakota
|
13
|
Harley M. Kilgore[8] (D-WV)
|
14
|
George Aiken (R-VT)
|
January 10, 1941
|
Former Governor of Vermont
|
15
|
Eugene D. Millikin (R-CO)
|
December 20, 1941
|
16
|
James Eastland (D-MS)
|
January 3, 1943
|
Previously a United States Senator from Mississippi
|
17
|
John Little McClellan (D-AR)
|
Former United States Representative from Arkansas (4 years)
|
18
|
Howard A. Smith (R-NJ)
|
December 7, 1944
|
19
|
Warren G. Magnuson (D-WA)
|
December 14, 1944
|
Former United States Representative com Washington (7 years)
|
20
|
J. William Fulbright (D-AR)
|
January 3, 1945
|
Former United States Representative from Arkansas
|
21
|
Bourke B. Hickenlooper (R-IA)
|
Former Governor of Iowa 20th in population (1940)
|
22
|
Olin D. Johnston (D-SC)
|
Former Governor of South Carolina 26th in population (1940)
|
23
|
Homer E. Capehart (R-IN)
|
United States Senator from Indiana 12th in population (1940)
|
24
|
Wayne Morse (D-OR)
|
United States from Oregon 34th in population (1940)
|
25
|
Leverett Saltonstall (R-MA)
|
January 4, 1945
|
Former Governor of Massachusetts
|
26
|
Milton Young (R-ND)
|
March 12, 1945
|
27
|
William F. Knowland (R-CA)
|
August 26, 1945
|
28
|
Spessard Holland (D-FL)
|
September 25, 1946
|
Former Governor of Florida
|
29
|
Ralph Flanders (R-VT)
|
November 1, 1946
|
30
|
A. Willis Robertson (D-VA)
|
November 6, 1946
|
Former United States Representative from Virgínia (13 years and 10 months)
|
31
|
John Sparkman (D-AL)
|
Former United States Representative from Alabama (9 years and 10 months)
|
32
|
William E. Jenner (R-IN)
|
January 3, 1947
|
Previously a United States senator from Indiana
|
33
|
Edward Martin (R-PA)
|
Former Governor of Pennsylvania 2nd in population (1940)
|
34
|
John W. Bricker (R-OH)
|
Former Governor of Ohio 4th in population (1940)
|
35
|
Edward John Thye (R-MN)
|
Former Governor of Minnesota 18th in population (1940)
|
36
|
Irving Ives (R-NY)
|
United States Senator from New York 1st in population (1940)
|
37
|
Joseph McCarthy (R-WI)
|
United States Senator from Wisconsin 13th in population (1940)
|
38
|
Arthur Vivian Watkins (R-UT)
|
United States Senator from Utah 40th in population (1940)
|
39
|
John J. Williams (R-DE)
|
United States from Delaware 47th in population (1940)
|
40
|
George W. Malone (R-NV)
|
United States Senator from Nevada 48th in population (1940)
|
41
|
John C. Stennis (D-MS)
|
November 17, 1947
|
42
|
Karl Mundt (R-SD)
|
December 31, 1948
|
Former United States Representative from South Dakota
|
43
|
Russell B. Long (D-LA)
|
44
|
Matthew M. Neely (D-WV)
|
January 3, 1949
|
Former representative (twice), Former Governor of West Virgínia and Previously a United States senator from West Virgínia (twice)
|
45
|
Lyndon Johnson (D-TX)
|
Former United States Representative from Texas (12 years) and Previously a Vice President of the United States
|
46
|
Estes Kefauver (D-TN)
|
Former United States Representative from Tennessee (10 years)
|
47
|
Margaret Chase Smith (R-ME)
|
Former United States Representative from Maine (8 years and 7 months)
|
48
|
Clinton Anderson (D-NM)
|
Former cabinet secretary, Former Representative from New Mexico (4 years)
|
49
|
Robert S. Kerr (D-OK)
|
Former Governor of Oklahoma 22nd in population (1940)
|
50
|
Andrew F. Schoeppel (R-KS)
|
Former Governor of Kansas 29th in population (1940)
|
51
|
Paul Douglas (D-IL)
|
United States Senator from Illinois 3rd in population (1940)
|
52
|
Hubert Humphrey (D-MN)
|
Minnesota 18th in population (1940)
|
53
|
Joseph Frear, Jr. (D-DE)
|
Delaware 47th in population (1940)
|
54
|
Henry Dworshak (R-ID)
|
October 14, 1949
|
Previously a United States senator from Idaho
|
55
|
Herbert H. Lehman (D-NY)
|
November 9, 1949
|
Former Governor of New York
|
56
|
Frank Carlson (R-KS)
|
November 27, 1950
|
Former United States Representative from Kansas (12 years) and Former governor of Kansas
|
57
|
Earle C. Clements (D-KY)
|
Former United States Representative from Kentucky (3 years) and Former Governor of Kentucky
|
58
|
John O. Pastore (D-RI)
|
December 19, 1950
|
59
|
Everett Dirksen (R-IL)
|
January 3, 1951
|
Former United States Representative from Illinois (16 years)
|
60
|
Francis H. Case (R-SD)
|
Former United States Representative from South Dakota (14 years)
|
61
|
Almer Monroney (D-OK)
|
Former United States Representative from Oklahoma (12 years)
|
62
|
Thomas C. Hennings, Jr. (D-MO)
|
Former United States Representative from Missouri (6 years)
|
63
|
George Smathers (D-FL)
|
Former United States Representative from Florida (4 years)
|
64
|
John M. Butler (R-MD)
|
Maryland 28th in population (1940)
|
65
|
Wallace F. Bennett (R-UT)
|
Utah 40th in population (1940)
|
66
|
Herman Welker (R-ID)
|
Idaho 43rd in population (1940)
|
67
|
James H. Duff (R-PA)
|
January 16, 1951
|
68
|
Charles E. Potter (R-MI)
|
November 5, 1952
|
Former United States Representative from Michigan
|
69
|
Prescott Bush (R-CT)
|
70
|
Thomas Kuchel (R-CA)
|
January 2, 1953
|
71
|
William A. Purtell (R-CT)
|
January 3, 1953
|
Previously a United States senator from Connecticut
|
72
|
Albert Gore, Sr. (D-TN)
|
Former United States Representative from Tennessee (14 years)
|
73
|
Henry M. Jackson (D-WA)
|
Former United States Representative from Washington (12 years)
|
74
|
James Glenn Beall (R-MD)
|
Former United States Representative from Maryland (10 years), Maryland 24th in population (1950)
|
75
|
Mike Mansfield (D-MT)
|
Former United States Representative from Montana (10 years), Montana 42nd in population (1950)
|
76
|
John F. Kennedy (D-MA)
|
Former United States Representative from Massachusetts (6 years)
|
77
|
Frederick G. Payne (R-ME)
|
Former Governor, Maine 35th in population (1950)
|
78
|
Frank A. Barrett (R-WY)
|
Former Governor, Wyoming 48th in population (1950)
|
79
|
Price Daniel (D-TX)
|
Texas 6th in population (1950)
|
80
|
Stuart Symington (D-MO)
|
Missouri 12th in population (1950)
|
81
|
Barry Goldwater (R-AZ)
|
Arizona 37th in population (1950)
|
82
|
Sam Ervin (D-NC)
|
June 5, 1954
|
83
|
Norris Cotton (R-NH)
|
November 8, 1954
|
Former United States Representative from New Hampshire (7 years and 10 months)
|
84
|
Roman Hruska (R-NE)
|
Former United States Representative from Nebraska (1 year and 10 months)
|
85
|
Joseph C. O'Mahoney (D-WY)
|
November 29, 1954
|
Previously a United States senator from Wyoming
|
86
|
W. Kerr Scott (D-NC)
|
87
|
Alan Bible (D-NV)
|
December 2, 1954
|
88
|
George H. Bender (R-OH)
|
December 16, 1954
|
89
|
Strom Thurmond[9] (I-SC)
|
December 24, 1954
|
90
|
Carl Curtis (R-NE)
|
January 1, 1955
|
Former United States Representative from Nebraska (15 years)
|
91
|
Alben W. Barkley[10] (D-KY)
|
January 3, 1955
|
Previously a United States senator from Kentucky; former Vice President of the United States
|
92
|
Clifford P. Case (R-NJ)
|
Former United States Representative from New Jersey (8 years)
|
93
|
Thomas Martin (R-IA)
|
Former United States Representative from Iowa (6 years)
|
94
|
Patrick V. McNamara (D-MI)
|
Maryland 24th in population (1950)
|
95
|
Richard L. Neuberger (D-OR)
|
Oregon 31st in population (1950)
|
96
|
Gordon L. Allott (R-CO)
|
Colorado 32nd in population (1950)
|
|
William R. Laird, III (D-WV)
|
March 13, 1956
|
|
Thomas A. Wofford (D-SC)
|
April 5, 1956
|
|
Robert Humphreys (R-KY)
|
June 21, 1956
|
|
W. Chapman Revercomb (R-WV)
|
November 7, 1956
|
Previously a United States senator from West Virgínia (6 years)
|
|
John Sherman Cooper (R-KY)
|
Previously a senator (twice) (total tenure 4 years and 4 months)
|
|
Strom Thurmond (D-SC)
|
Former governor, Previously a United States senator from South Carolina (1 year and 3 months)
|