The state of Pennsylvania, USA is currently served by a total of 15 area codes:
These Pennsylvania area codes overlay (cover the same geographic area). The first code listed is the parent code. Overlay area codes are added when no more phone numbers are available in an existing Numbering Plan Area.
| City | County | Area code(s) |
|---|---|---|
| Allentown | Lehigh | 610/484/835 |
| Altoona | Blair | 814/582 |
| Bethel Park | Allegheny | 412/878 |
| Bethlehem | Lehigh | 610/484/835 |
| Chester | Delaware | 610/484/835 |
| Erie | Erie | 814/582 |
| Harrisburg | Dauphin | 717/223 |
| Lancaster | Lancaster | 717/223 |
| Levittown | Bucks | 215/267/445 |
| Norristown | Montgomery | 610/484/835 |
| Philadelphia | Philadelphia | 215/267/445 |
| Pittsburgh | Allegheny | 412/878 |
| Reading | Berks | 610/484/835 |
| Scranton | Lackawanna | 570/272 |
| Wilkes-Barre | Luzerne | 570/272 |
| York | York | 717/223 |