City · South Dakota · United States
Mound City, SD — ZIP codes
1 ZIP code · Campbell County
- City
- Mound City
- County
- Campbell
- State
- South Dakota
- Country
- United States
- Postal code
- 57646Single source
- Coordinates
- 45.6786, -100.0479 View on OpenStreetMap
- Area code
- 605
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 57646 | Mound 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 · U.S. Census Bureau (ACS). Last generated : 2026-08-21. Report an error.