Identifiers: city · borough · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Philadelphia (city), PA | 1,603,797 |
| 2 | Norristown (borough), PA | 35,748 |
| 3 | King of Prussia (CDP), PA | 24,695 |
| 4 | Lansdale (borough), PA | 18,773 |
| 5 | Horsham (CDP), PA | 15,193 |
| 6 | Willow Grove (CDP), PA | 13,730 |
| 7 | Montgomeryville (CDP), PA | 12,998 |
| 8 | Harleysville (CDP), PA | 9,899 |
| 9 | Roslyn (CDP), PA | 9,525 |
| 10 | Quakertown (borough), PA | 9,359 |
| 11 | Bala Cynwyd (CDP), PA | 9,285 |
| 12 | Conshohocken (borough), PA | 9,261 |
| 13 | Perkasie (borough), PA | 9,120 |
| 14 | Audubon (CDP), PA | 8,688 |
| 15 | Doylestown (borough), PA | 8,300 |
| 16 | Hatboro (borough), PA | 8,238 |
| 17 | Villanova (CDP), PA | 8,213 |
| 18 | Kulpsville (CDP), PA | 8,159 |
| 19 | Glenside (CDP), PA | 7,737 |
| 20 | Plymouth Meeting (CDP), PA | 7,452 |