- Mescalero Apache Nation2
- Metzenbaum, Howard M.2
- Michael Ellis2
- Mike Murphy Media, Inc.2
- Miller, George, III, 1945-2
- Mohl, Arthur F.2
- Mondale, Joan2
- Morgan, Roy W.2
- Morita, Pat, 1932-20052
- Morse, Wayne L. (Wayne Lyman), 1900-19742
- Moss, John E. (John Emerson), 1915-19972
- Mubārak, Muḥammad Ḥusnī, 1928-20202
- Mundt, Karl E. (Karl Earl), 1900-19742
- Murphy, John M., 1926-20152
- Murphy, Putnam, Shorr and Partners2
- Nagle, David R. (David Ray), 1943-2
- National Council of Senior Citizens2
- National Federation of the Blind2
- National Governors' Association2
- National Institutes of Health (U.S.)2
