61489 Zip Code
| City: | Williamsfield |
| State: | IL |
| County: | Knox County |
| Area Codes: | 309 |
| Latitude: | 40.92 |
| Longitude: | -90.01 |
| Time Zone: | America/Chicago |
| Population in 2010: | 900 |
| School District: | Farmington Central Community Unit School District 265 |
| District Code: | 44 |