- Manette Heights
- Manley
- Manor Park
- Manor Park Apartments
- Maplechase
- Maplecrest
- Marabou Meadows
- Marshallton Green
- Marshallton Heights II
- Marydale
- Masonicville
- Mayfield
- Mayview Manor
- McClellandville
- McDaniel Heights
- McDonough
- Meadow Vista
- Meadowbrook
- Meadowbrook Farms
- Meadowbrook Farms South
- Meadowood
- Mechanicsville
- Meeting House Hill
- Meeting House Meadows
- Melanie
- Melody Meadows
- Melody Meadows II
- Mendenhall Village
- Mermaid
- Mermaid Run