Identifiers: city · CDP · borough
| Rank | Community | Population |
|---|---|---|
| 1 | Philadelphia (city), PA | 1,603,797 |
| 2 | Levittown (CDP), PA | 52,699 |
| 3 | Norristown (borough), PA | 35,748 |
| 4 | King of Prussia (CDP), PA | 24,695 |
| 5 | Lansdale (borough), PA | 18,773 |
| 6 | Horsham (CDP), PA | 15,193 |
| 7 | Willow Grove (CDP), PA | 13,730 |
| 8 | Montgomeryville (CDP), PA | 12,998 |
| 9 | Croydon (CDP), PA | 10,014 |
| 10 | Harleysville (CDP), PA | 9,899 |
| 11 | Bristol (borough), PA | 9,861 |
| 12 | Morrisville (borough), PA | 9,809 |
| 13 | Roslyn (CDP), PA | 9,525 |
| 14 | Bala Cynwyd (CDP), PA | 9,285 |
| 15 | Conshohocken (borough), PA | 9,261 |
| 16 | Fairless Hills (CDP), PA | 9,041 |
| 17 | Doylestown (borough), PA | 8,300 |
| 18 | Hatboro (borough), PA | 8,238 |
| 19 | Villanova (CDP), PA | 8,213 |
| 20 | Kulpsville (CDP), PA | 8,159 |