Identifiers: city · CDP · borough
| Rank | Community | Population |
|---|---|---|
| 1 | Lebanon (city), PA | 26,814 |
| 2 | Hershey (CDP), PA | 13,858 |
| 3 | Ephrata (borough), PA | 13,794 |
| 4 | Elizabethtown (borough), PA | 11,639 |
| 5 | Middletown (borough), PA | 9,533 |
| 6 | Lititz (borough), PA | 9,381 |
| 7 | Mount Joy (borough), PA | 8,325 |
| 8 | Palmyra (borough), PA | 7,830 |
| 9 | Campbelltown (CDP), PA | 5,922 |
| 10 | Manheim (borough), PA | 5,046 |
| 11 | Annville (CDP), PA | 4,759 |
| 12 | Cornwall (borough), PA | 4,604 |
| 13 | East Petersburg (borough), PA | 4,573 |
| 14 | Hummelstown (borough), PA | 4,544 |
| 15 | Akron (borough), PA | 4,152 |
| 16 | Myerstown (borough), PA | 3,094 |
| 17 | Brownstown (CDP), PA | 3,081 |
| 18 | Salunga (CDP), PA | 2,963 |
| 19 | Rothsville (CDP), PA | 2,960 |
| 20 | Pleasant Hill (CDP), PA | 2,926 |