- Lemolo
- Leon
- Leque Island
- Lester
- Levering
- Levey
- Lewisville
- Lexington
- Liberty
- Liberty
- Liberty Lake
- Liberty Village Mobile Home Park
- Lichty
- Lilliwaup
- Limestone Junction
- Lincoln
- Lincoln
- Lind
- Lindseys Mobile Home Park
- Linkshire Market Mobile Home Park
- Lions Island
- Lisabeula
- Littell
- Little Blalock Island
- Little Boston
- Little Cedars Mobile Home Park
- Little Deadman Island
- Little Elkhorn
- Little Falls
- Little Hoquiam