List of members of the United States Congress by longevity of service
Senate time
Columns: Total tenure rank | Uninterrupted rank | Name | State represented | Total tenure time | Uninterrupted time
1 | 1 | Robert Byrd | West Virginia | 51 years, 176 days | 51 years, 176 days | 2 | 2 | Daniel Inouye | Hawaii | 49 years, 349 days | 49 years, 349 days | 3 | 4 | Strom Thurmond (I) | South Carolina | 47 years, 159 days | 46 years, 57 days | 4 | 3 | Ted Kennedy | Massachusetts | 46 years, 292 days | 46 years, 292 days | 5 | 5 | Carl Hayden | Arizona | 41 years, 305 days | 41 years, 305 days | 6 | 6 | John C. Stennis | Mississippi | 41 years, 59 days | 41 years, 59 days | 7 | 7 | Ted Stevens | Alaska | 40 years, 10 days | 40 years, 10 days | 8 | 8 | Patrick Leahy | Vermont | 39years, 29days | 39years, 29days | 9 | 9 | Ernest Hollings | South Carolina | 38 years, 55 days | 38 years, 55 days | 10 | 10 | Richard Russell, Jr. | Georgia | 38 years, 9 days | 38 years, 9 days | 11 | 11 | Russell B. Long | Louisiana | 38 years, 3 days | 38 years, 3 days | 12 | 999 | Francis E. Warren (I) | Wyoming | 37 years, 6 days | n/a | 13 | 12 | Orrin Hatch | Utah | 37years, 29days | 37years, 29days | 14 | 999 | James Eastland (I) | Mississippi | 36 years, 83 days | n/a | 15 | 13 | Warren Magnuson | Washington | 36 years, 20 days | 36 years, 20 days | 16 | 14 | Joe Biden | Delaware | 36 years, 12 days | 36 years, 12 days | 17 | 15 | Claiborne Pell | Rhode Island | 36 years, 0 days | 36 years, 0 days | 18 | 16 | Pete Domenici | New Mexico | 36 years, 0 days | 36 years, 0 days | 19 | 17 | Richard Lugar | Indiana | 36 years, 0 days | 36 years, 0 days