Identifiers: borough · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Hanover (borough), PA | 16,429 |
| 2 | Parkville (CDP), PA | 8,263 |
| 3 | Gettysburg (borough), PA | 7,106 |
| 4 | Littlestown (borough), PA | 4,782 |
| 5 | Carroll Valley (borough), PA | 3,940 |
| 6 | Fayetteville (CDP), PA | 3,208 |
| 7 | McSherrystown (borough), PA | 3,077 |
| 8 | Guilford (CDP), PA | 2,923 |
| 9 | Dillsburg (borough), PA | 2,635 |
| 10 | Lake Meade (CDP), PA | 2,539 |
| 11 | Pennville (CDP), PA | 2,430 |
| 12 | Lake Heritage (CDP), PA | 2,158 |
| 13 | Mount Holly Springs (borough), PA | 1,995 |
| 14 | New Oxford (borough), PA | 1,868 |
| 15 | Bonneauville (borough), PA | 1,758 |
| 16 | East Berlin (borough), PA | 1,542 |
| 17 | Hampton (CDP), PA | 1,432 |
| 18 | Biglerville (borough), PA | 1,225 |
| 19 | Midway (CDP), PA | 1,059 |
| 20 | Abbottstown (borough), PA | 1,022 |