M
- Edward MacDowell (1860–1908)
- Tod Machover (born 1953)
- Janet Maguire (born 1927)
- Martin Mailman (1932–2000)
- Ursula Mamlok (born 1923)
- Henry Mancini (1924–1994)
- Michael Jackson (1958-2009)
- Paul Manz (1919–2009)
- Matteo Marchisano-Adamo (born 1973)
- George W. Marston (1840–1901)
- Henry Martin (born 1950)
- Donald Martino (1931–2005)
- Ingram Marshall (born 1942)
- Salvatore Martirano (1927–1995)
- David Maslanka (born 1943)
- Daniel Gregory Mason (1873–1953)
- Lowell Mason (1792–1872)
- William Mason (1829–1908)
- Richard Maxfield (1927–1969)
- John McGuire (born 1942)
- George Frederick McKay (1899–1970)
- Kirke Mechem (born 1925)
- Harold Meltzer (born 1966)
- Alan Menken (born 1949)
- Peter Mennin (1923–1983)
- Gian Carlo Menotti (1911–2007)
- Gregory Mertl (born 1969)
- Edgar Meyer (born 1960)
- Eric Moe (born 1954)
- John Christopher Moller (1755–1803)
- Meredith Monk (born 1942)
- Douglas Moore (1893–1969)
- Mary Carr Moore (1873–1957)
- Undine Smith Moore (1904–1989)
- Robert Moran (born 1937)
- Paul Moravec (born 1957)
- Justin Morgan (1747–1798)
- Jerome Moross (1913–1983)
- Robert Morris (born 1943)
- Robert Muczynski (1929–2010)
- Nico Muhly (born 1981)
- Carli Muñoz (born 1948)
- John Musto (born 1954)
Read more about this topic: List Of American Composers