Identifiers: city · borough · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Philadelphia (city), PA | 1,603,797 |
| 2 | Norristown (borough), PA | 35,748 |
| 3 | Chester (city), PA | 32,605 |
| 4 | Drexel Hill (CDP), PA | 29,181 |
| 5 | King of Prussia (CDP), PA | 24,695 |
| 6 | Lansdale (borough), PA | 18,773 |
| 7 | West Chester (borough), PA | 18,671 |
| 8 | Phoenixville (borough), PA | 18,602 |
| 9 | Horsham (CDP), PA | 15,193 |
| 10 | Willow Grove (CDP), PA | 13,730 |
| 11 | Ardmore (CDP), PA | 13,566 |
| 12 | Yeadon (borough), PA | 12,054 |
| 13 | Broomall (CDP), PA | 11,718 |
| 14 | Lansdowne (borough), PA | 11,107 |
| 15 | Darby (borough), PA | 10,715 |
| 16 | Harleysville (CDP), PA | 9,899 |
| 17 | Woodlyn (CDP), PA | 9,685 |
| 18 | Roslyn (CDP), PA | 9,525 |
| 19 | Bala Cynwyd (CDP), PA | 9,285 |
| 20 | Conshohocken (borough), PA | 9,261 |