City · Iowa · United States
Ionia, IA — ZIP codes
1 ZIP code · Chickasaw County
- City
- Ionia
- County
- Chickasaw
- State
- Iowa
- Country
- United States
- Postal code
- 50645Single source
- Coordinates
- 43.0403, -92.4865 View on OpenStreetMap
- Area code
- 641 (from the nearest rate centre)
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 50645 | Ionia | 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 · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Last generated : 2026-08-21. Report an error.