ZIP code · Williamsfield · Illinois · United States
ZIP code 61489 — Williamsfield
ZIP code 61489 serves Williamsfield, Illinois.
- Postal code
- 61489Single source Value from one source, not cross-checked.
- City
- Williamsfield
- County
- Knox
- State
- Illinois
- Country
- United States
- Coordinates
- 40.9277, -90.0267 — precision precise (locality)
View on OpenStreetMap - Population
- 743 (ZCTA, ACS 5-year)
- Median household income
- $83,625
- Median age
- 44.2
About this page
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 · census-acs5. Data generated on 2026-08-21. Methodology · Report an error on this page