Pennsylvania Gazetteer
| Name | County | Total Population | |
|---|---|---|---|
| 1. | City of Philadelphia | Philadelphia | 1,587,938 |
| 2. | City of Pittsburgh | Allegheny | 306,949 |
| 3. | City of Allentown | Lehigh | 124,944 |
| 4. | City of Erie | Erie | 96,809 |
| 5. | City of Reading | Berks | 91,994 |
| 6. | City of Bethlehem | Northampton | 77,107 |
| 7. | City of Scranton | Lackawanna | 75,049 |
| 8. | City of Lancaster | Lancaster | 61,382 |
| 9. | Levittown Census Designated Place | Bucks | 51,841 |
| 10. | City of Harrisburg | Dauphin | 50,901 |
| 11. | Borough of State College | Centre | 45,727 |
| 12. | City of York | York | 44,992 |
| 13. | City of Altoona | Blair | 44,063 |
| 14. | City of Wilkes-Barre | Luzerne | 41,602 |
| 15. | Borough of Norristown | Montgomery | 35,777 |
| 16. | City of Chester | Delaware | 34,133 |
| 17. | Municipality of Bethel Park | Allegheny | 32,639 |
| 18. | City of Williamsport | Lycoming | 28,592 |
| 19. | Drexel Hill Census Designated Place | Delaware | 27,975 |
| 20. | City of Easton | Northampton | 27,716 |
