- Lambourne Downs
- Lambson
- Lancaster
- Lancaster Corner
- Lancaster Hill
- Land-O-Lakes
- Land of Promise
- Land Tree
- Lander
- Landhaven
- Landon Station
- Landon Village
- Landonville
- Landover
- Landover Park
- Lands End
- Lane Beach
- Lanedon
- Langdon Woods
- Langford
- Langford Acres
- Langford Bay Estates
- Langley Island
- Langmaid Landing
- Langrells Island
- Lanham
- Lanham-Seabrook
- Lansdowne
- Lansdowne-Baltimore Highlands
- Lap