Identifiers: city · borough · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Lancaster (city), PA | 58,039 |
| 2 | Ephrata (borough), PA | 13,794 |
| 3 | Elizabethtown (borough), PA | 11,639 |
| 4 | Wyomissing (borough), PA | 11,114 |
| 5 | Columbia (borough), PA | 10,207 |
| 6 | Lititz (borough), PA | 9,381 |
| 7 | Willow Street (CDP), PA | 9,149 |
| 8 | Mount Joy (borough), PA | 8,325 |
| 9 | Millersville (borough), PA | 7,903 |
| 10 | Leola (CDP), PA | 7,465 |
| 11 | New Holland (borough), PA | 5,743 |
| 12 | Shillington (borough), PA | 5,475 |
| 13 | Manheim (borough), PA | 5,046 |
| 14 | East Petersburg (borough), PA | 4,573 |
| 15 | Sinking Spring (borough), PA | 4,286 |
| 16 | Akron (borough), PA | 4,152 |
| 17 | Maytown (CDP), PA | 4,098 |
| 18 | Denver (borough), PA | 3,792 |
| 19 | West Wyomissing (CDP), PA | 3,630 |
| 20 | Reamstown (CDP), PA | 3,367 |