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- John T. La Barbera —Pane Amaro, What's Up Scarlet?, Children of Fate: Life and Death in a Sicilian Family
- Fariborz Lachini
- Thorsten Laewe
- Bappi Lahiri
- Francis Lai (b. 1932) —Love Story, Bilitis, A Man and a Woman
- Laibach (formed 1980) —Iron Sky
- Nick Laird-Clowes
- Constant Lambert
- Russ Landau
- Marcel Landowski
- Bruce Langhorne
- Daniel Lanois
- Laraaji
- Glen A. Larson
- Nathan Larson
- Richard LaSalle
- James Last
- Alexander Laszlo
- Felice Lattuada
- Tats Lau
- Ken Lauber
- William Lava
- Angelo Francesco Lavagnino
- Tom Lavin
- James Lavino
- David Nessim Lawrence —American Pie, High School Musical
- Elliot Lawrence
- Stephen J. Lawrence
- Maury Laws
- Raam Laxman
- Jean-Marc Lederman
- Lee Byung-woo (b.1965) —A Tale of Two Sisters, The Host, Mother
- Raymond Lefèvre (1929–2008) —Le Gendarme de Saint-Tropez, La Soupe aux choux
- Michel Legrand (b.1932) —Cléo from 5 to 7, The Umbrellas of Cherbourg, F for Fake
- Barry Leitch
- Christopher Lennertz (b.1972) —Medal of Honor: Rising Sun, Saint Sinner, Alvin and the Chipmunks, Supernatural
- Sean Lennon
- Nicholas Lens
- Stefano Lentini
- Patrick Leonard
- Raymond Leppard
- Sondre Lerche (b.1982) —Dan in Real Life
- Cory Lerios
- César Lerner
- Jérôme Leroy
- Yaacov Bilansky Levanon
- Sylvester Levay
- Laurent Levesque
- James S. Levine
- Michael A. Levine
- Krishna Levy (b.1964) —8 Women
- Louis Levy
- Lucian Necula (b. 1984) —Music Composer and Arranger
- Shuki Levy
- Frank Lewin
- Herschell Gordon Lewis
- Leslie Lewis
- Paul Lewis
- Jan Leyers
- Blake Leyh
- Sven Libaek
- Michael Licari
- Daniel Licht
- György Ligeti
- Russell Lieblich
- Krister Linder
- Hal Lindes
- Zdeněk Liška
- Zülfü Livaneli
- Jay Livingston
- Andrew Lloyd Webber
- Lowell Lo
- Los Lobos
- Didier Lockwood
- Malcolm Lockyer
- Joseph LoDuca —Xena: Warrior Princess, The Evil Dead, Hercules: The Legendary Journeys, Army of Darkness
- John Loeffler
- Frederick Loewe
- Henning Lohner
- Jon Lord
- Rob Lord
- Saša Lošić
- Alexina Louie
- Louiguy
- Jacques Loussier
- Chris Lowe
- David Lowe
- Mundell Lowe
- Jaye Luckett
- Ralph Lundsten
- Evan Lurie
- John Lurie
- Danny Lux
- David Lynch (b.1946) —Eraserhead, Inland Empire, Twin Peaks: Fire Walk with Me
- Liam Lynch
Read more about this topic: List Of Film Score Composers