List of members of the United States Congress by longevity of service House and Senate time House and Senate time

| Total_tenure_rank | Uninterrupted_rank | Name_ | Party_affiliation | Total_tenure_time | Uninterrupted_time |
|---|---|---|---|---|---|
| 51 | 44 | John Taber (H) | Republican Party | 39 years, 305 days | 39 years, 305 days |
| 52 | 45 | William M. Colmer (H) | Democratic Party | 39 years, 305 days | 39 years, 305 days |
| 53 | 999 | Samuel Smith (H,S,I) | Democratic Party | 39 years, 9 days | n/a |
| 54 | 999 | John Little McClellan (H,S,I) | Democratic Party | 38 years, 329 days | n/a |
| 55 | 46 | Patrick Leahy (S) | Democratic Party | 39years, 29days | 39years, 29days |
| 56 | 47 | Max Baucus (H,S) | Democratic Party | 39years, 29days | 39years, 29days |
| 57 | 48 | Chuck Grassley (H,S) | Republican Party | 39years, 29days | 39years, 29days |
| 58 | 49 | Tom Harkin (H,S) | Democratic Party | 39years, 29days | 39years, 29days |
| 59 | 50 | George Miller (H) | Democratic Party | 39years, 29days | 39years, 29days |