| City | County | 2026 Pop. ↓ |
|---|---|---|
| York | York County | 45,408 |
| York | York County | 31,836 |
| Yeadon | Delaware County | 12,393 |
| Youngwood | Westmoreland County | 2,861 |
| Yardley | Bucks County | 2,571 |
| Young | Jefferson County | 1,667 |
| Young | Indiana County | 1,662 |
| Youngsville | Warren County | 1,621 |
| Yoe | York County | 1,058 |
| York Springs | Adams County | 703 |
| York Haven | York County | 687 |
| Yatesville | Luzerne County | 652 |
| Yorkana | York County | 236 |
| Youngstown | Westmoreland County | 236 |