City · South Dakota · United States
Willow Lake, SD — ZIP codes
1 ZIP code · Clark County
- City
- Willow Lake
- County
- Clark
- State
- South Dakota
- Country
- United States
- Postal code
- 57278Single source
- Coordinates
- 44.6272, -97.6747 View on OpenStreetMap
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 57278 | Willow Lake | 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. Last generated : 2026-08-21. Report an error.