text: Gary Kurtz – Oscar-nominated film producer (American Graffiti, Star Wars, The Empire Strikes Back)
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  Mills Lane – boxing referee and TV's People's Court judge
  Jim Lange – television game show host, including The Dating Game.
  Dan Lauria – television, stage and film actor (The Wonder Years)
  Eddie LeBaron – professional football player
  Robert Leckie – author of over 40 American war history books who was later portrayed in the HBO miniseries The Pacific (2010)
  Jim Lehrer – journalist, host of PBS' The NewsHour with Jim Lehrer
  Alfred Lerner – financier, Chairman of MBNA Corporation
  Sheldon Lettich – screenwriter, film director and producer (Bloodsport, Rambo III, Double Impact)
  Joe Lisi  – actor (Third Watch), retired NYPD Captain
  Carey Loftin – professional stuntman, stunt coordinator and actor (Bullitt, Vanishing Point, Duel, The French Connection)
  Clayton J. Lonetree – spied for Russia in the mid-1980s
  Tommy Loughran – world boxing champion
  Jack R. Lousma – NASA astronaut
  Robert A. Lutz – Vice Chairman of Global Product Development at General Motors Corporation
  Robert Ludlum – author (The Bourne Identity)
  William Lundigan – actor (Men into Space)
  Ted Lyons  – baseball Hall of Famer
  M
  George Maharis – Emmy Award-nominated and Theatre World Award-winning actor and singer
  Jock Mahoney – actor, stuntman (Tarzan Goes to India, The Range Rider)