- Mount DeSales
- Mount Vista Estates
- Mount Wilson
- Mountvista
- Murray Hill
- My Ladys Manor Estates
- Ma Leg Island
- MacDonald Farms
- Mackall
- Mackall Estates
- Marion Oaks
- Marlboro Hills
- Mary E White Estate
- Maryland Gardens
- Matapeake
- Meadow Creek Estates
- Meadow Oaks
- Meadow Run Park
- Mill Branch Estates
- Mill Seat
- Mosley Acres
- Mount Harmony Estates
- Mount Harmony Hills
- Mountain Laurel Manor
- Musgrove Estates
- Mutual
- Mutual Consent
- Mutual Estates
- Manchester Park
- Manor Heights