- Mohnton Lawn
- Molltown
- Monocacy
- Montello
- Monterey
- Montrose Manor
- Morysville
- Moselem
- Moselem Springs
- Mount Airy
- Mount Pleasant
- Mountain Park
- Mountain Village Mobile Home Park
- Muhlenberg
- Muhlenberg Park
- Martinsburg Junction
- McKee
- Mill Run
- Millerstown
- Mount Etna
- Musselman Grove
- Magnolia Hill
- Maple Beach
- Maple Point
- Maple Shade
- Margo Gardens
- Mechanics Valley
- Mechanicsville
- Mews at Wickford Commons
- Midway