- Marshall Island
- McCrea Mills
- McPherson
- Mechlings Corner
- Milltown
- Mount Airy
- Mount Joy
- Mount Lebanon
- Mount Pleasant
- Mountainville
- Muirhead
- Marshalls Corner
- Meadows Terrace
- Mercerville-Hamilton Square
- Millstone
- Moore
- MacArthur Manor
- Maple Meade
- Martins Landing
- Matchaponix
- Maurer
- Mechanicsville
- Melrose
- Menlo Park
- Menlo Park Terrace
- Middlesex Downs
- Moerls Corner
- Monroe Township
- Morgan
- Morgan Heights