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

| 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 |