Identifiers: city · CDP · borough
| Rank | Community | Population |
|---|---|---|
| 1 | Harrisburg (city), PA | 50,099 |
| 2 | Lebanon (city), PA | 26,814 |
| 3 | Colonial Park (CDP), PA | 16,243 |
| 4 | Hershey (CDP), PA | 13,858 |
| 5 | Elizabethtown (borough), PA | 11,639 |
| 6 | Progress (CDP), PA | 11,168 |
| 7 | Middletown (borough), PA | 9,533 |
| 8 | Mechanicsburg (borough), PA | 9,311 |
| 9 | Mount Joy (borough), PA | 8,325 |
| 10 | Camp Hill (borough), PA | 8,130 |
| 11 | Palmyra (borough), PA | 7,830 |
| 12 | New Cumberland (borough), PA | 7,507 |
| 13 | Lower Allen (CDP), PA | 7,465 |
| 14 | Linglestown (CDP), PA | 6,539 |
| 15 | Steelton (borough), PA | 6,263 |
| 16 | Enola (CDP), PA | 6,103 |
| 17 | Campbelltown (CDP), PA | 5,922 |
| 18 | Rutherford (CDP), PA | 5,765 |
| 19 | Paxtonia (CDP), PA | 5,450 |
| 20 | Lawnton (CDP), PA | 4,967 |