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 |
|---|---|---|---|---|---|
| 74 | 999 | Alben W. Barkley (H,S,I) | Democratic Party | 37 years, 74 days | n/a |
| 75 | 62 | Henry B. Gonzalez (H) | Democratic Party | 37 years, 60 days | 37 years, 60 days |
| 76 | 999 | Francis E. Warren (S,I) | Republican Party | 37 years, 6 days | n/a |
| 77 | 63 | Ed Markey (H,S) | Democratic Party | 37years, 91days | 37years, 91days |
| 78 | 64 | Orrin Hatch (S) | Republican Party | 37years, 29days | 37years, 29days |
| 79 | 65 | Barbara Mikulski (H,S) | Democratic Party | 37years, 29days | 37years, 29days |
| 80 | 66 | Nick Rahall (H) | Democratic Party | 37years, 29days | 37years, 29days |
| 81 | 999 | James Eastland (S,I) | Democratic Party | 36 years, 83 days | n/a |
| 82 | 67 | Joe Biden (S) | Democratic Party | 36 years, 12 days | 36 years, 12 days |