- Long Cedar Island
- Long Hill
- Long Point Island
- Long Valley
- Longport
- Lopatcong Overlook
- Lores Island
- Lores Mill
- Louden
- Lovelady Island
- Low Moor
- Lower Bank
- Lower Fairmount
- Lower Forge
- Lower Harmony
- Lower Longwood
- Lower Mill
- Lower Montville
- Lower Squankum
- Lower Valley
- Lows Hollow
- Loyds Corner
- Lucaston
- Lumberton
- Lummistown
- Lyndhurst
- Lynn Woodoaks
- Lyons
- Lyonsville