Senators 14 / 21
Lorenzo Tañada (1898)
Lorenzo Teves (1918)
Louis C. Wyman (1917)
Lucía Topolansky (1944)
Luis Humberto Gómez Gallo (1962)
Luis Petcoff Naidenoff (1967)
Luis Viana (1962)
Luke Lea (1879)
Luke P. Poland (1815)
Lyman Trumbull (1813)
Mack Mattingly (1931)
Magnus Johnson (1871)
Malcolm Wallop (1933)
Marcelo Fuentes (1948)
Marcus A. Coolidge (1865)
Marcus A. Smith (1851)
Maria Cantwell (1958)
María Perceval (1956)
Mariano Jesús Cuenco (1888)
Marina Riofrío (1958)
Mario Uribe Escobar (1949)
Marion Butler (1863)
Mark Andrews (1926)
Mark Pryor (1963)
Mark Udall (1950)
Mark Warner (1954)
Marlow Cook (1926)
Martin Chittenden (1763)
Martin N. Johnson (1850)
Mary Landrieu (1955)
Maryon Pittman Allen (1925)
Matthew Butler (1836)
Matthew M. Neely (1874)
Matthew Quay (1833)
Max T. Malone (1953)
Mel Edwards (1937)
Meshech Weare (1713)
Michael J. Michot (1963)