City · Indiana · United States
Petroleum, IN — ZIP codes
1 ZIP code · Wells County
- City
- Petroleum
- County
- Wells
- State
- Indiana
- Country
- United States
- Postal code
- 46778Single source
- Coordinates
- 40.6114, -85.1526 View on OpenStreetMap
- Area code
- 260
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 46778 | Petroleum | 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.