Barrios de Pennsylvania M
- Main Line-Delaware (9)
- Manayunk (104)
- Manchester (12)
- Manheim/Lititz (7)
- Mantua (74)
- Market Square (7)
- Marshall-Shadeland (7)
- Mayfair (15)
- McKees Rocks (22)
- McKeesport-White Oak (16)
- Mechanicsville (1)
- Mid City Erie (3)
- Midtown Harrisburg (8)
- Midtown Village (84)
- Millersville/Conestoga/Willow St (1)
- Millvale (2)
- Morningside (5)
- Mount Hope (2)
- Mount Lebanon (15)
- Mount Washington (40)
- Mt Oliver (1)
- Mt Oliver Boro (4)
- Mulberry And Green (1)
- Munhall (11)
- Musser Park (4)
- Mussertown (2)