Pennsylvania Gazetteer
| Name | County | Total Population | |
|---|---|---|---|
| 1. | City of Philadelphia | Philadelphia | 1,599,611 |
| 2. | City of Pittsburgh | Allegheny | 308,468 |
| 3. | City of Allentown | Lehigh | 128,038 |
| 4. | City of Reading | Berks | 96,386 |
| 5. | City of Erie | Erie | 92,629 |
| 6. | City of Bethlehem | Northampton | 77,927 |
| 7. | City of Scranton | Lackawanna | 76,108 |
| 8. | City of Lancaster | Lancaster | 58,799 |
| 9. | Levittown Census Designated Place | Bucks | 52,369 |
| 10. | City of Harrisburg | Dauphin | 50,583 |
| 11. | City of York | York | 44,823 |
| 12. | City of Wilkes-Barre | Luzerne | 44,676 |
| 13. | City of Altoona | Blair | 43,063 |
| 14. | Borough of State College | Centre | 40,226 |
| 15. | Borough of Norristown | Montgomery | 35,953 |
| 16. | Municipality of Bethel Park | Allegheny | 33,301 |
| 17. | City of Chester | Delaware | 32,530 |
| 18. | City of Hazleton | Luzerne | 30,650 |
| 19. | City of Easton | Northampton | 29,463 |
| 20. | Drexel Hill Census Designated Place | Delaware | 28,547 |
