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- Long, Gillis William, 1923-19851
- Lowey, Nita1
- Luken, Thomas A.1
- Macdonald, Torbert H. (Torbert Hart), 1917-19761
- Macy, John W., 1917-19861
- Madden, Ray J. (Ray John), 1892-19871
- Magnuson, Warren G. (Warren Grant), 1905-19891
- Mahon, George Herman, 1900-19851
- Manchin, A. James, 1927-20031
- Mann, James R. (James Robert), 1920-20101
- Mantle, Mickey, 1931-19951
- Markey, Edward J.1
- McCloskey, Frank1
- McCloskey, Paul N., 1927-1
- McDonald, Gail Clements, 1944-1
- McEwen, Bob, 1950-1
- Meany, George, 1894-19801
- Melcher, John, 1924-20181
- Mikulski, Barbara1
