- M. Caldwell Butler Papers, 1945/20061
- M. Rupert Cutler Papers, 1930/2021, bulk 1962/20213
- M. Thomas Inge papers, 1879/20011
- M.H. Ross, Collector, Papers, 1930/19741
- M.H. Ross, Collector, Papers, 1931/19574
- MCV Foundation/Monumental Church records, 1957/19659
- Mabel DeVries Tanner, Playwright, Correspondence and Play Scripts, 1906/19651
- Mabel Hoggard, Educator, Papers, 1924/1989, bulk 1932/19891
- Mabel Horn Letters and Photographs, 1953/19561
- Maben Jones Papers6
- Macil Ingram, Compiler, AFL-CIO Dept. of Education Materials, 1949/19561
- Maddex Family Papers, 1937/20001
- Madison E. Marye Papers, 1932/20072
- Maggie Metheny, Author, Typescript regarding Travel by Wagon from West Virginia to Kansas, 1953/19571
- Magruder School Parent Teacher Association Scrapbook, 1949/19602