Encyclopedias, Almanacs, Transcripts, and Maps
- Martinsburg
- Martinson, Harry
- Martinson, Helga Maria (Moa)
- Martinsville
- Marugame
- Marville, Charles
- Marvin, Charles Frederick
- Marwan II
- Marwar
- Mary McLeod Bethune Council House National Historic Site
- Mary of England
- Mary Washington College
- Maryknoll
- Marzuq
- Masaya
- Masbate
- mascagnite
- Masham, Abigail, Lady
- Mashin, Draga
- Mashona