City levels are determined by the county in which they are located. If the city is not named below, it may be located within a county listed below. Visit the National Association of Counties website and type the city name into the "City/Zip Search" tab to determine the city's county. If the city is not listed below or is not located in a county below, that city is a Level 1.
| Level | City | County |
|---|---|---|
| 3 | Allentown / Easton / Bethlehem | Lehigh / Northampton |
| 3 | Bucks | Bucks |
| 4 | Chester / Radnor / Essington | Delaware |
| 2 | Erie | Erie |
| 4 | Gettysburg | Adams |
| 4 | Harrisburg | Dauphin County, excluding Hershey |
| 4 | Hershey | Hershey |
| 3 | Lancaster | Lancaster |
| 3 | Malvern / Frazer / Berwyn | Chester |
| 4 | Montgomery | Montgomery |
| 4 | Philadelphia | Philadelphia |
| 2 | Pittsburgh | Allegheny |
| 2 | Reading | Berks |
| 3 | State College | Centre |