US location post office
ZIP Code 57278
- Zip Code: 57278
- Type: Standard
- Official USPS city name: Willow Lake
- Official USPS State Code: SD
- Official State Name: South Dakota
- ZCTA: TRUE
- Population: 734.0
- Density: 1.6
- Primary Official County Code: 46025
- Primary Official County Name: Clark
- Official County Name: Clark
- Official County Code: 46025
- Imprecise: FALSE
- Military: FALSE
- Timezone: America/Chicago (12:36 PM Monday, May 13 2024-05-13 (GMT -0500))
- Geo Point: 44.63908, -97.69546
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