- Martin Luther King Jr.
- Martin Mull
- Martina Navratilova
- Marty Bucella
- Marty Rubin
- Marv Levy
- Marva Collins
- Marvin Gaye
- Mary Anne Radmacher
- Mary Calderone
- Mary H. Waldrip
- Mary Harris Jones
- Mary Heaton Vorse
- Mary Howitt
- Mary Kay Ash
- Mary Lou Retton
- Mary McCarthy
- Mary Morrissey
- Mary Oliver
- Mary Pettibone Poole
- Mary Ritter Beard
- Mary Shelley
- Mary Tyler Moore
- Mary Wilson Little
- Marya Mannes
- Mason Cooley
- Mason Cooley *
- Matshona Dhliwayo
- Matsuo Basho
- Matt Groening
- Matthew Arnold
- Maureen Dowd
- Maureen Murphy
- Maurice Barrymore
- Maurice Chevalier
- Maurice Maeterlinck
- Maurice Sendak
- Maurice Setters
- Maurice Switzer
- Max Beerbohm
- Max De Pree
- Max Eastman
- Max Frisch
- Max L. Forman
- Max Lucado
- Max Weber
- Maxim Gorky
- Maxime Lagacé
- Maxine Waters
- Maxwell Maltz