- 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
- McEwen, Bob, 1950-1
- Meany, George, 1894-19801
- Melcher, John, 1924-20181
- Mikulski, Barbara1
- Mikva, Abner J.1
- Moffett, Toby, 1944-1
- Mondale, Walter F., 1928-1
- Montgomery, G. V. (Gillespie V.)1
- Morris, John W., 1921-20131
- Morton, Rogers C. B. (Rogers Clark Ballard), 1914-19791
