61257 Zip Code
| City: | Hillsdale |
| State: | IL |
| County: | Rock Island County |
| Area Codes: | 309 |
| Latitude: | 41.61 |
| Longitude: | -90.17 |
| Time Zone: | America/Chicago |
| Population in 2010: | 1,210 |
| School District: | Riverdale Community Unit School District 100 |
| District Code: | 33930 |