- La Plata
- Lake Shore
- Largo
- Laurel
- Luke
- La Vale
- Lake Arbor
- Landover Hills
- Langley Park
- Laytonsville
- Leitersburg
- Leonardtown
- Lexington Park
- Linthicum
- Loch Lynn Heights
- Lochearn
- Lonaconing
- Londontowne
- Lusby
- Long Island (historical)
- Long Cove Estates
- La Isla
- La Plaine Estates
- Laceys Venture
- Ladiesburg
- Lafayettes Crossing
- Lahaina
- Lake
- Lake Anita Louise
- Lake Fairplay Estates