City · Ohio · United States
Roundhead, OH — ZIP codes
1 ZIP code · Hardin County
- City
- Roundhead
- County
- Hardin
- State
- Ohio
- Country
- United States
- Postal code
- 43346Single source
- Coordinates
- 40.5732, -83.8462 View on OpenStreetMap
- Area code
- 419 (from the nearest rate centre)
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 43346 | Roundhead | 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). Last generated : 2026-08-21. Report an error.