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U.S. ZIP Code 57421
5-digit United States postal code #57421, Amherst, SD
ZIP code 57421 is located in the city (place name) Amherst, сounty Marshall in the state of South Dakota. The population in ZIP code 57421 is 88 and the population density is 0.9. ZIP code 57421 refers to сounty Marshall having сounty FIPS 46091, the ratio of people from different counties in this ZIP code is as follows: all county weights - 46091: 100%. In the area of the ZIP code 57421 valid time zone America/Chicago.
ZIP: 57421
County: Marshall
Place Name: Amherst
State: South Dakota
State Abbreviation: SD
Coordinates: 45° 45' 13.176" N, 97° 54' 58.68" W
Latitude: 45.753660000000
Longitude: -97.916300000000
Population: 88
Density: 0.9/km2
Time zone: America/Chicago
County FIPS: 46091
All county weights: 46091: 100%