- Mastens Corner
- Mastens Heights Mobile Home Park
- Mayfair
- Mayfield
- Mayview Manor
- McClellandville
- McDaniel Heights
- McDonalds Crossroads
- McDonough
- McKnatt Corners
- McNichol Place
- Meadow Acres
- Meadow Glen
- Meadow Ridge
- Meadow Vista
- Meadowbrook
- Meadowbrook Acres
- Meadowbrook Farms
- Meadowbrook Farms South
- Meadowood
- Meadows
- Mechanicsville
- Meeting House Hill
- Meeting House Meadows
- Melanie
- Melbourne Manor
- Melody Meadows
- Melody Meadows II
- Melvin Crossroads
- Melvins