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 |
|---|---|---|---|---|---|
| 7 | 7 | Emanuel Celler (H) | Democratic Party | 49 years, 305 days | 49 years, 305 days |
| 8 | 8 | John Conyers (H) | Democratic Party | 49years, 29days | 49years, 29days |
| 9 | 9 | Sam Rayburn (H) | Democratic Party | 48 years, 257 days | 48 years, 257 days |
| 10 | 999 | Sidney R. Yates (H,I) | Democratic Party | 48 years, 0 days | n/a |
| 11 | 12 | Strom Thurmond (S,I) | Republican Party | 47 years, 159 days | 46 years, 57 days |
| 12 | 10 | Wright Patman (H) | Democratic Party | 47 years, 3 days | 47 years, 3 days |
| 13 | 11 | Ted Kennedy (S) | Democratic Party | 46 years, 292 days | 46 years, 292 days |
| 14 | 999 | Joseph Gurney Cannon (H,I) | Republican Party | 46 years, 0 days | n/a |