Encyclopedias, Almanacs, Transcripts, and Maps
- Mary Watson Whitney
- Mary White Ovington
- Mary Wollstonecraft
- Mary-Claire King
- Maryland Line
- Maryland, Mobilization in
- Masaryk, Tomáš Garrigue
- Masaryk, Tomáš Garrigue (1850–1937)
- Masewi and Oyoyewi
- MASH: An Army Surgeon in Korea>
- Maslenitsa
- Masonry in America
- Mass Strikes
- Massachusetts Bay Colony
- Massachusetts Circular Letter
- Massachusetts Line
- Massachusetts Provincial Congress
- Massachusetts, Mobilization in
- master of the king's music
- Matemela Cyril Ramaphosa