City · Illinois · United States
Williamsfield, IL — ZIP codes
1 ZIP code · Knox County
- City
- Williamsfield
- County
- Knox
- State
- Illinois
- Country
- United States
- Postal code
- 61489Single source
- Coordinates
- 40.9277, -90.0267 View on OpenStreetMap
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 61489 | Williamsfield | Single source |
Sources and verification
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames. Last generated : 2026-08-21. Report an error.