City · Illinois · United States
Mason City, IL — ZIP codes
1 ZIP code · Mason County
- City
- Mason City
- County
- Mason
- State
- Illinois
- Country
- United States
- Postal code
- 62664Single source
- Coordinates
- 40.2023, -89.6982 View on OpenStreetMap
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 62664 | Mason City | 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.