Rank |
Senator (party-state) |
Seniority date |
Other factors |
1 |
William Borah (R–ID) |
March 4, 1907 |
|
2 |
Ellison D. Smith (D–SC) |
March 4, 1909 |
South Carolina 24th in population (1900) |
3 |
Duncan U. Fletcher (D–FL) [9] |
Florida 33rd in population (1900) |
4 |
Henry F. Ashurst (D–AZ) |
April 2, 1912[10] |
|
5 |
Key Pittman (D–NV) |
January 29, 1913 |
6 |
Morris Sheppard (D–TX) |
February 3, 1913 |
7 |
Joseph Robinson (D–AR) |
March 4, 1913 |
Former representative (10 years), former governor |
8 |
George W. Norris (R–NE) |
Former representative (10 years) |
9 |
Kenneth McKellar (D–TN) |
March 4, 1917 |
Former representative (6 years) |
10 |
William H. King (D–UT) |
Former representative (3 years) |
11 |
Park Trammell (D–FL) [11] |
Former governor |
12 |
Frederick Hale (R–ME) |
|
13 |
Hiram Johnson (R–CA) |
March 16, 1917 |
14 |
Charles L. McNary (R–OR) |
December 18, 1918 |
15 |
Arthur Capper (R–KS) |
March 4, 1919 |
Former governor, Kansas 22nd in population (1910) |
16 |
Henry W. Keyes[12] (R–NH) |
Former governor, New Hampshire 39th in population (1910) |
17 |
Pat Harrison (D–MS) |
March 5, 1919 |
18 |
Carter Glass (D–VA) |
February 2, 1920 |
|
19 |
Peter Norbeck (R–SD) [13] |
March 4, 1921 |
20 |
Walter F. George (D–GA) |
November 22, 1922 |
21 |
James Couzens (R–MI) [14] |
November 29, 1922 |
22 |
Lynn Frazier (R–ND) |
March 4, 1923 |
Former governor |
23 |
Royal S. Copeland (D–NY) |
New York 1st in population (1920) |
24 |
Henrik Shipstead (FL–MN) |
Minnesota 17th in population (1920) |
25 |
Burton K. Wheeler (D–MT) |
Montana 39th in population (1920) |
26 |
Jesse H. Metcalf (R–RI) [12] |
November 4, 1924 |
|
27 |
Thomas D. Schall (R–MN) [15] |
March 4, 1925 |
28 |
Robert M. La Follette, Jr. (WP–WI) |
September 30, 1925 |
29 |
Gerald Nye (R–ND) |
November 14, 1925 |
30 |
David I. Walsh (D–MA) |
December 6, 1926 |
31 |
Carl Hayden (D–AZ) |
March 4, 1927 |
Former representative (15 years) |
32 |
Alben W. Barkley (D–KY) |
Former representative (14 years) |
33 |
Elmer Thomas (D–OK) |
Former representative (4 years), Oklahoma 21st in population (1920) |
34 |
Millard Tydings (D–MD) |
Former representative (4 years), Maryland 28th in population (1920) |
35 |
Robert F. Wagner (D–NY) |
New York 1st in population (1920) |
36 |
Hugo Black (D–AL) |
Alabama 18th in population (1920) |
37 |
Frederick Steiwer (R–OR) |
Oregon 34th in population (1920) |
38 |
Arthur H. Vandenberg (R–MI) |
March 31, 1928 |
|
39 |
Daniel Hastings (R–DE) [12] |
December 10, 1928 |
40 |
Bronson Cutting (R–NM) [16] |
March 4, 1929 |
Previously a senator |
41 |
Tom Connally (D–TX) |
Former representative |
42 |
John G. Townsend, Jr. (R–DE) |
43 |
Robert J. Bulkley (D–OH) |
December 1, 1930 |
Former representative |
44 |
Robert D. Carey (R–WY) [12] |
Former governor |
45 |
George McGill (D–KS) |
|
46 |
James J. Davis (R–PA) |
December 2, 1930 |
47 |
Thomas Gore (D–OK) [12] |
March 4, 1931 |
Previously a senator (14 years) |
48 |
Matthew M. Neely (D–WV) |
Previously a senator (6 years), former representative (8 years) |
49 |
J. Hamilton Lewis (D–IL) |
Previously a senator (6 years), former representative (2 years) |
50 |
James F. Byrnes (D–SC) |
Former representative (14 years), South Carolina 26th in population (1930) |
51 |
Wallace H. White, Jr. (R–ME) |
Former representative (14 years), Maine 35th in population (1930) |
52 |
L. J. Dickinson (R–IA) [12] |
Former representative (12 years) |
53 |
William J. Bulow (D–SD) |
Former governor |
54 |
Marcus A. Coolidge (D–MA) [12] |
Massachusetts 8th in population (1930) |
55 |
Josiah W. Bailey (D–NC) |
North Carolina 12th in population (1930) |
56 |
John H. Bankhead II (D–AL) |
Alabama 15th in population (1930) |
57 |
Marvel M. Logan (D–KY) |
Kentucky 17th in population (1930) |
58 |
Edward Costigan (D–CO) |
Colorado 33rd in population (1930) |
59 |
Warren Austin (R–VT) |
April 1, 1931 |
|
60 |
Hattie Caraway (D–AR) |
November 13, 1931 |
61 |
William Warren Barbour (D–NJ) [12] |
December 1, 1931 |
62 |
Huey Long (D–LA) [17] |
January 25, 1932 |
63 |
Robert R. Reynolds (D–NC) |
December 5, 1932 |
64 |
Richard Russell, Jr. (D–GA) |
January 12, 1933 |
65 |
Bennett Champ Clark (D–MO) |
February 4, 1933 |
66 |
Alva B. Adams (D–CO) |
March 4, 1933 |
Previously a senator |
67 |
Augustine Lonergan (D–CT) |
Former representative (8 years) |
68 |
William H. Dieterich (D–IL) |
Former representative (2 years), Illinois 3rd in population (1930) |
69 |
John H. Overton (D–LA) |
Former representative (2 years), Louisiana 22nd in population (1930) |
70 |
Harry F. Byrd, Sr. (D–VA) |
Former governor, Virginia 20th in population (1930) |
71 |
Fred H. Brown (D–NH) |
Former governor, New Hampshire 41st in population (1930) |
72 |
William Gibbs McAdoo (D–CA) |
California 6th in population (1930) |
73 |
Frederick Van Nuys (D–IN) |
Indiana 11th in population (1930) |
74 |
F. Ryan Duffy (D–WI) |
Wisconsin 13th in population (1930) |
75 |
Nathan L. Bachman (D–TN) |
Tennessee 16th in population (1930) |
76 |
Louis Murphy[18] (D–IA) |
Iowa 19th in population (1930) |
77 |
Homer T. Bone (D–WA) |
Washington 30th in population (1930) |
78 |
Elbert D. Thomas (D–UT) |
Utah 40th in population (1930) |
79 |
James Pope (D–ID) |
Idaho 42nd in population (1930) |
80 |
Pat McCarran (D–NV) |
Nevada 48th in population (1930) |
81 |
Carl Hatch (D–NM) |
October 10, 1933 |
|
82 |
Ernest W. Gibson (R–VT) |
November 21, 1933 |
83 |
Joseph C. O’Mahoney (D–WY) |
January 1, 1934 |
84 |
James Murray (D–MT) |
November 7, 1934 |
85 |
Peter G. Gerry (D–RI) |
January 3, 1935 |
Previously a senator |
86 |
Francis T. Maloney (D–CT) |
Former representative, Connecticut 29th in population (1930) |
87 |
Edward R. Burke (D–NE) |
Former representative, Nebraska 32nd in population (1930) |
88 |
Vic Donahey (D–OH) |
Former governor, Ohio 4th in population (1930) |
89 |
A. Harry Moore (D–NJ) |
Former governor, New Jersey 9th in population (1930) |
90 |
Theodore G. Bilbo (D–MS) |
Former governor, Mississippi 23rd in population (1930) |
91 |
Joseph F. Guffey (D–PA) |
Pennsylvania 2nd in population (1930) |
92 |
Harry S. Truman (D–MO) |
Missouri 10th in population (1930) |
93 |
Sherman Minton (D–IN) |
Indiana 11th in population (1930) |
94 |
George L. P. Radcliffe (D–MD) |
Maryland 28th in population (1930) |
95 |
Lewis B. Schwellenbach (D–WA) |
Washington 30th in population (1930) |
|
Dennis Chavez (D–NM) |
May 11, 1935 |
|
96 |
Rush D. Holt (D–WV) |
June 21, 1935 |
|
Elmer Benson (FL–MN) [19] |
December 27, 1935 |
|
Rose McConnell Long (D–LA) [12] |
January 31, 1936 |
|
Scott Loftin (D–FL) [20] |
May 26, 1936 |
|
William L. Hill (D–FL) [21] |
July 1, 1936 |
|
Guy Mark Gillette (D–IA) |
November 4, 1936 |
Former representative |
|
Guy Howard (R–MN) [12] |
Minnesota 18th in population (1930) |
|
Charles O. Andrews (D–FL) |
Florida 31st in population (1930) |
|
Claude Pepper (D–FL) |
|
Prentiss M. Brown (D–MI) |
November 19, 1936 |
|
|
Herbert E. Hitchcock (D–SD) |
December 29, 1936 |