- McDonalds Crossroads
- McNichol Place
- Meadow Acres
- Meadows
- Messick Development
- Meyle Estates
- Middle Island
- Middleford
- Middleford Acres
- Middlesex Beach
- Midnight Thicket
- Midway
- Midway Estates
- Midway Park
- Midway Park Subdivision
- Mill Creek Manor
- Mill Pond Acres
- Mill Run Acres
- Miller Creek Park Mobile Home Park
- Millpond Acres
- Mispillion Light
- Mission
- Morgan Island
- Morris Mill
- Mount Joy
- Mulberry Landing
- Murray Estates
- Murrays Corner
- Murrays Development
- Murrays Haven