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- Marc Macaulay (born 1957); actor, Burn Notice; born in Millinocket
- Bob Marley, stand-up comedian; from Portland; born in Bangor
- Andrea Martin (born 1947), actress, comedienne, voice actress, My Big Fat Greek Wedding, Kim Possible, Earthworm Jim; born in Portland
- H.S. Maxim (1840–1916); inventor of Maxim gun; born in Sangerville
- Cynthia McFadden (born 1956); co-anchor of Nightline and Primetime; born in Lewiston
- Edna St. Vincent Millay (1892–1950); poet; born in Rockland
- George J. Mitchell (born 1933); former U.S. Senate Majority Leader
- Matthew Mulligan (born 1985); tight end for the New York Jets; born in Bangor and lived in Enfield
- Edmund Muskie (1914–1996); politician, Governor of Maine, and Vice Presidential candidate
Read more about this topic: List Of People From Maine