Luce - Mapp
- Luce, Clare Boothe
- Luce, Henry Robinson
- Luchow's
- Lucky Charms
- Lucky Lindy
- Lucky Stores Inc.
- Lucky Strike
- Lucy Show
- Lucy Stoner
- Luden's
- Ludington
- Ludlow, Roger
- Lufkin
- Lugosi, Bela
- Luiseno
- Luke Skywalker
- Luks, George Benjamin
- lulu
- Lumbee
- lumberjack
- Lumet, Sidney
- Lummi
- Lummi Reservation
- Lunar Module
- Lunar Orbiter
- lunch
- lunch bag
- lunch box
- lunch-bucket
- luncheon
- lunchmeats
- Lundy's Lane, Battle of
- Lundy, Benjamin
- Luther College
- Lyceum Movement
- Lynch Law
- Lynchburg
- lynching
- Lynd, Robert Staughton and Lynd, Helen Merrell
- Lyndon B. Johnson National Historical Park
