| City | County | 2025 Pop. ↓ |
|---|---|---|
| York | York County | 44,919 |
| York township | York County | 30,661 |
| Yeadon | Delaware County | 12,389 |
| Youngwood | Westmoreland County | 2,870 |
| Yardley | Bucks County | 2,568 |
| Young township | Indiana County | 1,682 |
| Young township | Jefferson County | 1,667 |
| Youngsville | Warren County | 1,647 |
| Yoe | York County | 1,050 |
| York Springs | Adams County | 706 |
| York Haven | York County | 690 |
| Yatesville | Luzerne County | 648 |
| Youngstown | Westmoreland County | 244 |
| Yorkana | York County | 234 |