- Mount Wesley
- Mumfords Landing
- Mystic Harbor
- Manchester
- Middletown
- Midland
- Mount Vernon
- Mount Vernon
- Mayo
- Mount Airy
- Mardela Springs
- Marlow Heights
- Marlton
- Martins Additions
- Marydel
- Maryland City
- Madison
- Madonna
- Magnolia
- Manokin
- Manor
- Marbury
- Marriottsville
- Marshall Hall
- Massey
- Mattapex
- Mattawoman
- Matthews
- McDaniel
- McHenry