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 |
|---|---|---|---|---|---|---|---|
| 7 | Howard Baker | November 15, 1925 | January 3, 1967 | January 3, 1985 | Tennessee | Republican | 47years, 29days |
| 7 | Edward Brooke | October 26, 1919 | January 3, 1967 | January 3, 1979 | Massachusetts | Republican | 47years, 29days |
| 9 | Marlow Cook | July 27, 1926 | December 17, 1968 | December 27, 1974 | Kentucky | Republican | 45years, 46days |
| 10 | Bob Dole | July 22, 1923 | January 3, 1969 | June 1, 1996 | Kansas | Republican | 45years, 29days |
| 10 | Mike Gravel | May 13, 1930 | January 3, 1969 | January 3, 1981 | Alaska | Democrat | 45years, 29days |
| 10 | Bob Packwood | September 11, 1932 | January 3, 1969 | October 1, 1995 | Oregon | Republican | 45years, 29days |
| 10 | Richard Schweiker | June 1, 1926 | January 3, 1969 | January 3, 1981 | Pennsylvania | Republican | 45years, 29days |