Barrios de Pennsylvania M
- Main Line-Delaware (7)
- Main Line-Montgomery (1)
- Manayunk (119)
- Manchester (13)
- Manheim/Lititz (10)
- Mantua (85)
- Market Square (8)
- Marshall-Shadeland (10)
- Marvintown (2)
- Mayfair (7)
- McKeesport-White Oak (17)
- Mid City Erie (3)
- Midtown Harrisburg (8)
- Midtown Village (101)
- Millersville/Conestoga/Willow St (4)
- Minooka (1)
- Morningside (3)
- Mount Lebanon (17)
- Mount Washington (21)
- Mt Oliver Boro (10)
- Munhall (16)
- Musser Park (6)
- Mussertown (3)