US location post office
ZIP Code 57634
- Zip Code: 57634
- Type: Standard
- Official USPS city name: Keldron
- Official USPS State Code: SD
- Official State Name: South Dakota
- ZCTA: TRUE
- Population: 155.0
- Density: 0.3
- Primary Official County Code: 46031
- Primary Official County Name: Corson
- Official County Name: Corson
- Official County Code: 46031
- Imprecise: FALSE
- Military: FALSE
- Timezone: America/Denver (03:30 AM Friday, July 25 2025-07-25 (GMT -0600))
- Geo Point: 45.75269, -101.88428
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