| Official Zip Code Name | Willow Street |
| Zip Code State | Pennsylvania |
| Primary County: | Lancaster |
| Area Code | 717/223 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 5 |
| Elevation Range | 383 ft. |
| Area | 14.815 Sqm. |
| Coordinates(Y,X) | 39.966241, -76.257831 |