- Langhorne Gardens
- Langhorne Manor
- Langhorne Terrace
- Langville
- Lansdale
- Lansdowne
- Lanse
- Lansford
- Lantz
- Lantz Corners
- Lapidea
- Laporte
- Laquin
- Larabee
- Larchmont
- Larchmont Meadows
- Larchmont Square
- Lardin
- Lardintown
- Larimer
- Larke
- Larksville
- Larrys Creek
- Larryville
- Larue
- Lashley
- Latches Lane
- Latimore
- Latrobe
- Latta Grove