Earliest serving United States Senator
Earliest serving Senators currently living
Columns: Rank | Senator | Date of birth | Entered Senate | Left Senate | State served | Party | Time since entry
1 | Birch Bayh | January 22, 1928 | January 3, 1963 | January 3, 1981 | Indiana | Democrat | 51years, 29days | 2 | Fred R. Harris | November 13, 1930 | November 4, 1964 | January 3, 1973 | Oklahoma | Democrat | 49years, 89days | 3 | Walter Mondale | January 5, 1928 | December 30, 1964 | December 30, 1976 | Minnesota | Democrat | 49years, 33days | 4 | Joseph Tydings | May 4, 1928 | January 3, 1965 | January 3, 1971 | Maryland | Democrat | 49years, 29days | 5 | Robert P. Griffin | November 6, 1923 | May 11, 1966 | January 2, 1979 | Michigan | Republican | 47years, 266days | 6 | Ernest Hollings | January 1, 1922 | November 9, 1966 | January 3, 2005 | South Carolina | Democrat | 47years, 84days | 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 | 14 | Adlai Stevenson III | October 10, 1930 | November 17, 1970 | January 3, 1981 | Illinois | Democrat | 43years, 76days | 15 | John V. Tunney | June 26, 1934 | January 2, 1971 | January 1, 1977 | California | Democrat | 43years, 30days | 16 | Bill Brock | November 23, 1930 | January 3, 1971 | January 3, 1977 | Tennessee | Republican | 43years, 29days | 16 | James L. Buckley | March 9, 1923 | January 3, 1971 | January 3, 1977 | New York | Conservative | 43years, 29days | 16 | Lowell P. Weicker, Jr. | May 16, 1931 | January 3, 1971 | January 3, 1989 | Connecticut | Republican | 43years, 29days | 19 | David H. Gambrell | December 20, 1929 | February 1, 1971 | November 8, 1972 | Georgia | Democrat | 43years, 0days | 20 | Elaine S. Edwards | March 8, 1929 | August 1, 1972 | November 13, 1972 | Louisiana | Democrat | 41years, 184days | 21 | Sam Nunn | September 8, 1938 | November 8, 1972 | January 3, 1997 | Georgia | Democrat | 41years, 85days | 22 | Bennett Johnston Jr. | June 10, 1932 | November 13, 1972 | January 3, 1997 | Louisiana | Democrat | 41years, 80days | 23 | James Abourezk | February 24, 1931 | January 3, 1973 | January 3, 1979 | South Dakota | Democrat | 41years, 29days | 23 | Joe Biden | November 20, 1942 | January 3, 1973 | January 15, 2009 | Delaware | Democrat | 41years, 29days | 23 | Dick Clark | September 14, 1928 | January 3, 1973 | January 3, 1979 | Iowa | Democrat | 41years, 29days | 23 | Pete Domenici | May 7, 1932 | January 3, 1973 | January 3, 2009 | New Mexico | Republican | 41years, 29days | 23 | Walter Huddleston | April 15, 1926 | January 3, 1973 | January 3, 1985 | Kentucky | Democrat | 41years, 29days | 28 | Paul Laxalt | August 2, 1922 | December 18, 1974 | January 3, 1987 | Nevada | Republican | 39years, 45days | 29 | John Glenn | July 18, 1921 | December 24, 1974 | January 3, 1999 | Ohio | Democrat | 39years, 39days