Postal reference
ZIP 57421, South Dakota
ZIP code 57421 is associated with Amherst in South Dakota in the GeoNames postal reference.
Reference details
- State
- South Dakota (SD)
- ZIP code
- 57421
- Associated localities
- Amherst
- County names in postal records
- Marshall
- Approximate postal point
- 45.7585, -97.9274
View point on map ↗
Postal information is adapted from GeoNames, CC BY 4.0. Locality associations and coordinates are approximate, not ZIP boundaries or a guarantee of current mail delivery.