City · Ohio · United States
Eldorado, OH — ZIP codes
1 ZIP code · Preble County
- City
- Eldorado
- County
- Preble
- State
- Ohio
- Country
- United States
- Postal code
- 45321Single source
- Coordinates
- 39.8882, -84.6786 View on OpenStreetMap
- Area code
- 937
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 45321 | Eldorado | 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.