- Manchester
- Middletown
- Midland
- Mount Vernon
- Mount Vernon
- Mayo
- Mount Airy
- Mardela Springs
- Marlow Heights
- Marlton
- Martins Additions
- Marydel
- Maryland City
- Ma Leg Island
- Mabels Manor
- MacDonald Farms
- Maceys Corner
- MacGills Common
- Mackall
- Mackall Estates
- Macton
- Maddox
- Maddox Island
- Maddox Island
- Madison
- Madison Place
- Madonna
- Madonna Hills
- Madonna Manor
- Magness