Senators 18 / 21
Samuel J. R. McMillan (1826)
Samuel Prentiss (1782)
Samuel S. Phelps (1793)
Samuel Smith (1752)
Sandy Keith (1928)
Saxby Chambliss (1943)
Scott Ritcher (1969)
Scott W. Lucas (1892)
Sean Burrage (1968)
Sheila Frahm (1945)
Sheridan Downey (1884)
Sidney Breese (1800)
Simeon Olcott (1735)
Simon Guggenheim (1867)
Slade Gorton (1928)
Solomon Foot (1802)
Solomon W. Downs (1801)
Solon Borland (1808)
Sonia Escudero (1953)
Spark Matsunaga (1916)
Spencer Jarnagin (1792)
Stephen A. Douglas (1813)
Stephen M. Young (1889)
Steve Symms (1938)
Stevens Thomson Mason (1760)
Styles Bridges (1898)
Teresita Quintela (1950)
Terry Sanford (1917)
Thad Cochran (1937)
Thaddeus H. Caraway (1871)
Theodore E. Burton (1851)
Theodore F. Green (1867)
Theodore Foster (1752)
Theodore Frelinghuysen (1787)
Theodore G. Bilbo (1877)
Theodorus Bailey (1758)
Thomas A. Wofford (1908)
Thomas B. Catron (1840)
Thomas C. Hart (1877)