Pennsylvania Neighborhoods M
- Main Line-Delaware (13)
- Main Line-Montgomery (2)
- Manayunk (73)
- Manchester (6)
- Manheim/Lititz (12)
- Mantua (44)
- Market Square (7)
- Marshall-Shadeland (7)
- Marvintown (1)
- Mayfair (5)
- McKees Rocks (15)
- McKeesport-White Oak (15)
- Mechanicsville (2)
- Merion Station (3)
- Mid City Erie (2)
- Midtown Harrisburg (7)
- Midtown Village (104)
- Millersville/Conestoga/Willow St (2)
- Monroeville (21)
- Morningside (4)
- Morrisville (1)
- Morton (7)
- Mount Hope (1)
- Mount Lebanon (20)
- Mount Penn (1)
- Mount Washington (19)
- Mt Oliver Boro (7)
- Munhall (5)
- Musser Park (3)
- Mussertown (2)