L
- Frank La Forge (1879–1953)
- John La Montaine (born 1920)
- Ezra Laderman (born 1924)
- Lori Laitman (born 1955)
- Joseph Lamb (1887–1960)
- Charles Lucien Lambert (1828–1896)
- Lucien Lambert, Jr. (1858–1945)
- Benjamin Johnson Lang (1837–1909)
- David Lang (born 1957)
- Margaret Ruthven Lang (1867–1972)
- Vanessa Lann (born 1968)
- Paul Lansky (born 1944)
- Libby Larsen (born 1950)
- Morten Lauridsen (born 1943)
- Benjamin Lees (1924–2010)
- David Leisner (born 1953)
- James Lentini (born 1958)
- Jonathan Leshnoff (born 1973)
- John Lessard (1920–2003)
- Frank Lewin (1925–2008)
- Peter Scott Lewis (born 1953)
- Tania León (born 1943)
- Fred Lerdahl (born 1943)
- Paul Alan Levi (born 1941)
- Marvin David Levy (born 1932)
- Lowell Liebermann (born 1961)
- Peter Lieberson (1946–2011)
- Scott Lindroth (born 1958)
- Ervin Litkei (1921-2000)
- Dan Locklair (born 1949)
- Normand Lockwood (1906–2002)
- Charles Martin Loeffler (1861–1935)
- Hannibal Lokumbe (Marvin Peterson) (born 1948)
- Zhou Long (born 1953)
- Harvey Worthington Loomis (1865–1930)
- Alvin Lucier (born 1931)
- Otto Luening (1900–1996)
- Ralph Lyford (1882–1927)
Read more about this topic: List Of American Composers