| Marsh, Vivian Osborne (1897-1986) | People |
| Martin Luther King, Jr. Medical Center/Charles R. Drew University of Medicine and Science (1971- ) | Places |
| Mason, Bridget “Biddy” (1818–1891) | People |
| Mason, Dawn (1945- ) | People |
| Mathews, Meredith (1919-1992) | People |
| Matthews, Miriam (1905–2003) | People |
| Matthews, William Dominick (ca. 1833-ca. 1910) | People |
| Maxey, Carl (1924-1997) | People |
| Maxie, Peggy Joan (1936 - ) | People |
| McAdoo, Benjamin (1920-1981) | People |
| McCabe, Edward P. (1850-1920) | People |
| McDaniel, Hattie (1895-1952) | People |
| McDonald, William Madison (1866-1950) | People |
| McIver, Richard (1941-2013) | People |
| McJunkin, George (1851-1922) | People |
| McKinney, Samuel Berry (1926- ) | People |
| McLaurin, George W. (1887-1968) | People |
| McNary, Arizona | Places |
| McSmith, Blanche (1920-2006) | People |
| Meredith Mathews East Madison YMCA | Places |
| Merriwether, Ray (1924–2011) | People |
| Miller, D.D.S., Rosalie Reddick (1925-2005) | People |
| Miller, Loren (1903-1967) | People |
| Miller, M.D., Earl V. (1923-2005) | People |
| Mills, Harold (1953- ) | People |
| Mitchell, Charles H. (1940 - ) | People |
| Monroe, George Frazier (c. 1844-1886) | People |
| Montana Federation of Colored Women’s Clubs (1921-1972) | Organizations |
| Morris, Abe (1956- ) | People |
| Morrison, George (1891-1974) | People |
| Morrow, Isaac (1940--) | People |
| Moss, Harold (1929- ) | People |
| Mother’s Day Disturbance, 1969 | Events |
| Moulin Rouge | Places |
| Mount Zion Baptist Church, Seattle, Washington (1890- ) | Churches |
| Mozique, Edward "Sancho" (1849-1951) | People |
| Nabrit, Samuel Milton (1905-2003) | People |
| National Association for the Advancement of Colored People (NAACP) Vancouver Branch | Organizations |
| Neal, Annie Box (1870–1950) | People |
| Neal, William “Curly” (1849 –1936) | People |
| Negro Musicians’ Union, Local 493, Seattle | People |
| Negro Repertory Company (Seattle) 1936-1939 | Organizations |
| Negro Victory Committee (1941-1945) | Organizations |
| New Mexico Territory Slave Code (1859-1867) | Misc |
| Nickerson, William (1879-1945) | People |
| Nicodemus, Kansas (1877- ) | Places |
| Nixon, Lawrence A. (1883-1966) | People |
| Nobles, John (c. 1880s-c. 1940s) | People |
| Northwest Enterprise (1920-1954?) | Organizations |
| Oden, Ron (1950- ) | People |