- M. Caldwell Butler Papers, 1945/20061
- M. Rosaria Piomelli Architectural Collection, 1960/199521
- M. Rupert Cutler Papers, 1930/2021, bulk 1962/2021107
- M. Thomas Inge papers, 1879/20013
- Maakestad Collection, 1972/19842
- Mabel Hoggard, Educator, Papers, 1924/1989, bulk 1932/19891
- Maddex Family Papers, 1937/20021
- Madison E. Marye Papers, 1932/200714
- Maggie Anderson, Poet, Papers, 1958/2017, bulk 1980/201246
- Malcolm Davis, Artist, Papers, 1970/20159
- Malcolm MacPherson Brownlee Civil War diary and transcription, 1862/20201
- Manuscripts Artifact Collection, 1800/20107
- Manuscripts Audiovisual Collection, 1920/201311
- Map Collection, 1629/19911
- Map of Kentucke (reproduction), 1784/19851