| Rank |
Senator (party-state) |
Seniority date |
Other factors
|
| 1 |
Strom Thurmond[8] (R-SC) |
November 7, 1956 |
|
| 2 |
Robert Byrd (D-WV) |
January 3, 1959
|
| 3 |
Ted Kennedy (D-MA) |
November 7, 1962
|
| 4 |
Daniel Inouye (D-HI) |
January 3, 1963
|
| 5 |
Ernest Hollings (D-SC) |
November 9, 1966
|
| 6 |
Ted Stevens (R-AK) |
December 24, 1968
|
| 7 |
Jesse Helms[8] (R-NC) |
January 3, 1973 |
North Carolina 12th in population (1970)
|
| 8 |
Pete Domenici (R-NM) |
New Mexico 37th in population (1970)
|
| 9 |
Joe Biden (D-DE) |
Delaware 46th in population (1970)
|
| 10 |
Patrick Leahy (D-VT) |
January 3, 1975 |
|
| 11 |
Paul Sarbanes (D-MD) |
January 3, 1977 |
Former representative
|
| 12 |
Richard Lugar (R-IN) |
Indiana 11th in population (1970)
|
| 13 |
Orrin Hatch (R-UT) |
Utah 36th in population (1970)
|
| 14 |
Max Baucus (D-MT) |
December 15, 1978 |
|
| 15 |
Thad Cochran (R-MS) |
December 27, 1978
|
| 16 |
John Warner (R-VA) |
January 2, 1979
|
| 17 |
Carl Levin (D-MI) |
January 3, 1979
|
| 18 |
Chris Dodd (D-CT) |
January 3, 1981 |
Former representative (6 years) – Connecticut 24th in population (1970)
|
| 19 |
Chuck Grassley (R-IA) |
Former representative (6 years) – Iowa 25th in population (1970)
|
| 20 |
Arlen Specter (R-PA) |
Pennsylvania 3rd in population (1970)
|
| 21 |
Don Nickles (R-OK) |
Oklahoma 27th in population (1970)
|
| 22 |
Frank Murkowski[9] (R-AK) |
Alaska 50th in population (1970)
|
| 23 |
Jeff Bingaman (D-NM) |
January 3, 1983 |
|
| 24 |
John Kerry (D-MA) |
January 2, 1985
|
| 25 |
Tom Harkin (D-IA) |
January 3, 1985 |
Former representative (10 years)
|
| 26 |
Phil Gramm[8] (R-TX) |
Former representative (6 years)
|
| 27 |
Mitch McConnell (R-KY) |
|
| 28 |
Jay Rockefeller (D-WV) |
January 15, 1985
|
| 29 |
John Breaux (D-LA) |
January 3, 1987 |
Former representative (14 years)
|
| 30 |
Barbara Mikulski (D-MD) |
Former representative (10 years)
|
| 31 |
Richard Shelby (R-AL) |
Former representative (8 years) – Alabama 22nd in population (1980)
|
| 32 |
Tom Daschle (D-SD) |
Former representative (8 years) – South Dakota 45th in population (1980)
|
| 33 |
John McCain (R-AZ) |
Former representative (4 years) – Arizona 29th in population (1980)
|
| 34 |
Harry Reid (D-NV) |
Former representative (4 years) – Nevada 43rd in population (1980)
|
| 35 |
Bob Graham (D-FL) |
Former governor – Florida 7th in population (1980)
|
| 36 |
Kit Bond (R-MO) |
Former governor – Missouri 15th in population (1980)
|
| 37 |
Kent Conrad (D-ND) |
|
| 38 |
Trent Lott (R-MS) |
January 3, 1989 |
Former representative (16 years)
|
| 39 |
Jim Jeffords (R-VT)(I-VT) |
Former representative (14 years)
|
| 40 |
Herb Kohl (D-WI) |
Wisconsin 16th in population (1980)
|
| 41 |
Joe Lieberman (D-CT) |
Connecticut 25th in population (1980)
|
| 42 |
Conrad Burns (R-MT) |
Montana 44th in population (1980)
|
| 43 |
Daniel Akaka (D-HI) |
May 16, 1990 |
|
| 44 |
Bob Smith[8] (R-NH) |
December 7, 1990
|
| 45 |
Larry Craig (R-ID) |
January 3, 1991 |
Former representative
|
| 46 |
Paul Wellstone[10] (D-MN) |
|
| 47 |
Dianne Feinstein (D-CA) |
November 10, 1992
|
| 48 |
Byron Dorgan (D-ND) |
December 15, 1992
|
| 49 |
Barbara Boxer (D-CA) |
January 3, 1993 |
Former representative (10 years)
|
| 50 |
Judd Gregg (R-NH) |
Former representative (8 years)
|
| 51 |
Ben Nighthorse Campbell (R-CO) |
Former representative (6 years)
|
| 52 |
Russ Feingold (D-WI) |
Wisconsin 16th in population (1990)
|
| 53 |
Patty Murray (D-WA) |
Washington 18th in population (1990)
|
| 54 |
Bob Bennett (R-UT) |
Utah 35th in population (1990)
|
| 55 |
Kay Bailey Hutchison (R-TX) |
June 14, 1993 |
|
| 56 |
Jim Inhofe (R-OK) |
November 17, 1994
|
| 57 |
Fred Thompson[8] (R-TN) |
December 2, 1994
|
| 58 |
Olympia Snowe (R-ME) |
January 3, 1995 |
Former representative (16 years)
|
| 59 |
Mike DeWine (R-OH) |
Former representative (8 years) – Ohio 7th in population (1990)
|
| 60 |
Jon Kyl (R-AZ) |
Former representative (8 years) – Arizona 24th in population (1990)
|
| 61 |
Craig L. Thomas (R-WY) |
Former representative (6 years)
|
| 62 |
Rick Santorum (R-PA) |
Former representative (4 years)
|
| 63 |
Bill Frist (R-TN) |
|
| 64 |
Ron Wyden (D-OR) |
February 6, 1996
|
| 65 |
Sam Brownback (R-KS) |
November 7, 1996
|
| 66 |
Pat Roberts (R-KS) |
January 3, 1997 |
Former representative (16 years)
|
| 67 |
Dick Durbin (D-IL) |
Former representative (14 years) – Illinois 6th in population (1990)
|
| 68 |
Robert Torricelli[8] (D-NJ) |
Former representative (14 years) – New Jersey 9th in population (1990)
|
| 69 |
Tim Johnson (D-SD) |
Former representative (10 years)
|
| 70 |
Wayne Allard (R-CO) |
Former representative (6 years) – Colorado 26th in population (1990)
|
| 71 |
Jack Reed (D-RI) |
Former representative (6 years) – Rhode Island 43rd in population (1990)
|
| 72 |
Tim Hutchinson[8] (R-AR) |
Former representative (4 years)
|
| 73 |
Max Cleland[8] (D-GA) |
Georgia 11th in population (1990)
|
| 74 |
Mary Landrieu (D-LA) |
Louisiana 21st in population (1990)
|
| 75 |
Jeff Sessions (R-AL) |
Alabama 22nd in population (1990)
|
| 76 |
Gordon H. Smith (R-OR) |
Oregon 29th in population (1990)
|
| 77 |
Chuck Hagel (R-NE) |
Nebraska 36th in population (1990)
|
| 78 |
Susan Collins (R-ME) |
Maine 38th in population (1990)
|
| 79 |
Mike Enzi (R-WY) |
Wyoming 50th in population (1990)
|
| 80 |
Chuck Schumer (D-NY) |
January 3, 1999 |
Former representative (18 years)
|
| 81 |
Jim Bunning (R-KY) |
Former representative (12 years)
|
| 82 |
Mike Crapo (R-ID) |
Former representative (6 years)
|
| 83 |
Blanche Lincoln (D-AR) |
Former representative (4 years)
|
| 84 |
George Voinovich (R-OH) |
Former governor – Ohio 7th in population (1990)
|
| 85 |
Evan Bayh (D-IN) |
Former governor – Indiana 14th in population (1990)
|
| 86 |
Peter Fitzgerald (R-IL) |
Illinois 6th in population (1990)
|
| 87 |
John Edwards (D-NC) |
North Carolina 10th in population (1990)
|
| 88 |
Lincoln Chafee (R-RI) |
November 4, 1999 |
|
| 89 |
Zell Miller (D-GA) |
July 27, 2000
|
| 90 |
Bill Nelson (D-FL) |
January 3, 2001 |
Former representative (12 years)
|
| 91 |
Tom Carper (D-DE) |
Former representative (10 years)
|
| 92 |
Debbie Stabenow (D-MI) |
Former representative (4 years) – Michigan 8th in population (1990)
|
| 93 |
John Ensign (R-NV) |
Former representative (4 years) – Nevada 39th in population (1990)
|
| 94 |
George Allen (R-VA) |
Former representative (2 years) – Former governor
|
| 95 |
Maria Cantwell (D-WA) |
Former representative (2 years)
|
| 96 |
Ben Nelson (D-NE) |
Former governor
|
| 97 |
Hillary Clinton (D-NY) |
New York 2nd in population (1990)
|
| 98 |
Jon Corzine (D-NJ) |
New Jersey 9th in population (1990)
|
| 99 |
Jean Carnahan[11][8] (D-MO) |
Missouri 15th in population (1990)
|
| 100 |
Mark Dayton (D-MN) |
Minnesota 20th in population (1990)
|
| 101 |
Dean Barkley[8] (I-MN) |
November 5, 2002 |
|
| 102 |
Jim Talent[11] (R-MO) |
November 25, 2002
|
| 103 |
John Cornyn (R-TX) |
December 2, 2002
|
| 104 |
Lisa Murkowski (R-AK) |
December 20, 2002
|
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