| 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) |
Florida 33rd in population (1900)
|
| 4 |
Henry F. Ashurst (D-AZ) |
April 2, 1912[9] |
|
| 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) |
Former governor, Florida 33rd in population (1910)
|
| 12 |
John B. Kendrick (D-WY) [10] |
Former governor, Wyoming 47th in population (1910)
|
| 13 |
Frederick Hale (R-ME) |
|
| 14 |
Hiram Johnson (R-CA) |
March 16, 1917
|
| 15 |
Charles L. McNary (R-OR) |
December 18, 1918
|
| 16 |
Arthur Capper (R-KS) |
March 4, 1919 |
Former governor, Kansas 22nd in population (1910)
|
| 17 |
Henry W. Keyes (R-NH) |
Former governor, New Hampshire 39th in population (1910)
|
| 18 |
Pat Harrison (D-MS) |
March 5, 1919
|
| 19 |
Carter Glass (D-VA) |
February 2, 1920 |
|
| 20 |
Peter Norbeck (R-SD) |
March 4, 1921
|
| 21 |
David A. Reed (R-PA) [11] |
August 8, 1922
|
| 22 |
Walter F. George (D-GA) |
November 22, 1922
|
| 23 |
James Couzens (R-MI) |
November 29, 1922
|
| 24 |
Simeon Fess (R-OH) [11] |
March 4, 1923 |
Former representative (10 years), Ohio 4th in population (1920)
|
| 25 |
Hubert D. Stephens (D-MS) [11] |
Former representative (10 years), Mississippi 23rd in population (1920)
|
| 26 |
Clarence Dill (D-WA) [11] |
Former representative (4 years)
|
| 27 |
Lynn Frazier (R-ND) |
Former governor
|
| 28 |
Royal S. Copeland (D-NY) |
New York 1st in population (1920)
|
| 29 |
Henrik Shipstead (FL-MN) |
Minnesota 17th in population (1920)
|
| 30 |
Robert B. Howell (R-NE) [12] |
Nebraska 31st in population (1920)
|
| 31 |
Burton K. Wheeler (D-MT) |
Montana 39th in population (1920)
|
| 32 |
Porter H. Dale (R-VT) [13] |
November 7, 1923 |
|
| 33 |
Jesse H. Metcalf (R-RI) |
November 4, 1924
|
| 34 |
Thomas D. Schall (R-MN) |
March 4, 1925 |
Former representative
|
| 35 |
Sam G. Bratton (D-NM) [14] |
|
| 36 |
Robert M. La Follette, Jr. (R-WI) |
September 30, 1925
|
| 37 |
Arthur Robinson (R-IN) [11] |
October 20, 1925
|
| 38 |
Gerald Nye (R-ND) |
November 14, 1925
|
| 39 |
David I. Walsh (D-MA) |
December 6, 1926
|
| 40 |
Carl Hayden (D-AZ) |
March 4, 1927 |
Former representative (15 years)
|
| 41 |
Alben W. Barkley (D-KY) |
Former representative (14 years)
|
| 42 |
Elmer Thomas (D-OK) |
Former representative (4 years), Oklahoma 21st in population (1920)
|
| 43 |
Millard Tydings (D-MD) |
Former representative (4 years), Maryland 28th in population (1920)
|
| 44 |
Robert F. Wagner (D-NY) |
New York 1st in population (1920)
|
| 45 |
Hugo Black (D-AL) |
Alabama 18th in population (1920)
|
| 46 |
Frederick Steiwer (R-OR) |
Oregon 34th in population (1920)
|
| 47 |
Arthur H. Vandenberg (R-MI) |
March 31, 1928 |
|
| 48 |
Daniel Hastings (R-DE) |
December 10, 1928
|
| 49 |
Bronson Cutting (R-NM) |
March 4, 1929 |
Previously a senator
|
| 50 |
Tom Connally (D-TX) |
Former representative (12 years)
|
| 51 |
Roscoe C. Patterson (R-MO) [11] |
Former representative (2 years)
|
| 52 |
Henry D. Hatfield (R-WV) [11] |
Former governor, West Virginia 27th in population (1920)
|
| 53 |
Phillips Lee Goldsborough (R-MD) [11] |
Former governor, Maryland 28th in population (1920)
|
| 54 |
John G. Townsend, Jr. (R-DE) |
Former governor, Delaware 46th in population (1920)
|
| 55 |
Hamilton Kean (R-NJ) [11] |
New Jersey 10th in population (1920)
|
| 56 |
Frederic Walcott (R-CT) [11] |
Connecticut 29th in population (1920)
|
| 57 |
Felix Hebert (R-RI) [11] |
Rhode Island 38th in population (1920)
|
| 58 |
Robert J. Bulkley (D-OH) |
December 1, 1930 |
Former representative
|
| 59 |
Robert D. Carey (R-WY) |
Former governor
|
| 60 |
George McGill (D-KS) |
|
| 61 |
James J. Davis (R-PA) |
December 2, 1930
|
| 62 |
Thomas Gore (D-OK) |
March 4, 1931 |
Previously a senator (14 years)
|
| 63 |
Matthew M. Neely (D-WV) |
Previously a senator (6 years), former representative (8 years)
|
| 64 |
J. Hamilton Lewis (D-IL) |
Previously a senator (6 years), former representative (2 years)
|
| 65 |
James F. Byrnes (D-SC) |
Former representative (14 years), South Carolina 26th in population (1930)
|
| 66 |
Wallace H. White, Jr. (R-ME) |
Former representative (14 years), Maine 35th in population (1930)
|
| 67 |
L. J. Dickinson (R-IA) |
Former representative (12 years)
|
| 68 |
William J. Bulow (D-SD) |
Former governor
|
| 69 |
Marcus A. Coolidge (D-MA) |
Massachusetts 8th in population (1930)
|
| 70 |
Josiah W. Bailey (D-NC) |
North Carolina 12th in population (1930)
|
| 71 |
John H. Bankhead II (D-AL) |
Alabama 15th in population (1930)
|
| 72 |
Marvel M. Logan (D-KY) |
Kentucky 17th in population (1930)
|
| 73 |
Edward Costigan (D-CO) |
Colorado 33rd in population (1930)
|
| 74 |
Warren Austin (R-VT) |
April 1, 1931 |
|
| 75 |
Hattie Caraway (D-AR) |
November 13, 1931
|
| 76 |
William Warren Barbour (D-NJ) |
December 1, 1931
|
| 77 |
Huey Long (D-LA) |
January 25, 1932
|
| 78 |
Robert R. Reynolds (D-NC) |
December 5, 1932
|
| 79 |
Richard Russell, Jr. (D-GA) |
January 12, 1933
|
| 80 |
Bennett Champ Clark (D-MO) |
February 4, 1933
|
| 81 |
Alva B. Adams (D-CO) |
March 4, 1933 |
Previously a senator
|
| 82 |
Augustine Lonergan (D-CT) |
Former representative (8 years)
|
| 83 |
William H. Dieterich (D-IL) |
Former representative (2 years), Illinois 3rd in population (1930)
|
| 84 |
John H. Overton (D-LA) |
Former representative (2 years), Louisiana 22nd in population (1930)
|
| 85 |
Harry F. Byrd, Sr. (D-VA) |
Former governor, Virginia 20th in population (1930)
|
| 86 |
Fred H. Brown (D-NH) |
Former governor, New Hampshire 41st in population (1930)
|
| 87 |
William Gibbs McAdoo (D-CA) |
California 6th in population (1930)
|
| 88 |
Frederick Van Nuys (D-IN) |
Indiana 11th in population (1930)
|
| 89 |
F. Ryan Duffy (D-WI) |
Wisconsin 13th in population (1930)
|
| 90 |
Nathan L. Bachman (D-TN) |
Tennessee 16th in population (1930)
|
| 91 |
Louis Murphy (D-IA) |
Iowa 19th in population (1930)
|
| 92 |
Homer T. Bone (D-WA) |
Washington 30th in population (1930)
|
| 93 |
Elbert D. Thomas (D-UT) |
Utah 40th in population (1930)
|
| 94 |
James Pope (D-ID) |
Idaho 42nd in population (1930)
|
| 95 |
Pat McCarran (D-NV) |
Nevada 48th in population (1930)
|
| 96 |
John E. Erickson (D-NM) [15] |
March 13, 1933 |
|
|
William H. Thompson (D-KS) [16] |
May 24, 1933
|
|
Carl Hatch (D-NM) |
October 10, 1933
|
|
Ernest W. Gibson (R-VT) |
November 21, 1933
|
|
Joseph C. O’Mahoney (D-WY) |
January 1, 1934
|
|
Richard Hunter (D-NE) [11] |
November 7, 1934 |
Nebraska 32nd in population (1930)
|
|
James Murray (D-MT) |
Montana 39th in population (1930)
|
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