Encyclopedias, Almanacs, Transcripts, and Maps
- Marshall, James Wilson
- Marshall, Samuel Lyman Atwood
- Marsic War
- Marston, Philip Bourke
- marsupial anteater
- Martaban, Gulf of
- Martelly, Michel Joseph
- Martens, Feodor
- Martens, Georg Friedrich von
- Martens, Wilfried
- Martignac, Jean Baptiste Sylvère Gay, vicomte de
- Martin de Porres
- Martin Luther King, Jr. National Historic Site
- Martin Van Buren National Historic Site
- Martín, Esteban
- Martin, François Xavier
- Martin, Homer Dodge
- Martin, Josiah
- Martinelli, Ricardo
- Martínez de la Rosa, Francisco