Earliest serving United States Senator Earliest serving Senators currently living Earliest serving Senators currently living

| Rank_ | Senator | Date_of_birth | Entered_Senate | Left_Senate | State_served | Party | Time_since_entry |
|---|---|---|---|---|---|---|---|
| 23 | Walter Huddleston | April 15, 1926 | January 3, 1973 | January 3, 1985 | Kentucky | Democrat | 41years, 29days |
| 28 | Paul Laxalt | August 2, 1922 | December 18, 1974 | January 3, 1987 | Nevada | Republican | 39years, 45days |
| 29 | John Glenn | July 18, 1921 | December 24, 1974 | January 3, 1999 | Ohio | Democrat | 39years, 39days |