Barrios de Pennsylvania M
- Main Line-Delaware (11)
- Manchester (7)
- Manheim/Lititz (16)
- Mantua (72)
- Market Square (8)
- Marshall-Shadeland (6)
- Marvintown (5)
- Mayfair (3)
- McKeesport-White Oak (25)
- Mid City Erie (5)
- Middle Hill (2)
- Midtown Harrisburg (22)
- Midtown Village (19)
- Millersville/Conestoga/Willow St (3)
- Minooka (1)
- Morningside (7)
- Mt Oliver Boro (7)
- Musser Park (2)
- Mussertown (8)