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ZIP Code 57421 – Amherst, SD

Amherst, South Dakota · Marshall County · Central time

ZIP code57421
CityAmherst
StateSouth Dakota
CountyMarshall County
Area code605
Population75
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area33.34 sq mi
Center (lat, long)45.7555, -97.9071

Map

Nearby ZIP codes

57432 Claremont · 7.8 mi57430 Britton · 10.6 mi57454 Langford · 12.2 mi57449 Houghton · 13.1 mi57446 Hecla · 14.3 mi57468 Pierpont · 19.6 mi58017 Cogswell · 20 mi57433 Columbia · 21.5 mi

About ZIP 57421

ZIP code 57421 is assigned to Amherst, South Dakota. It lies in Marshall County. Its Census area covers about 33.34 square miles of land. The closest neighboring ZIP is 57432 (Claremont), about 7.8 miles away.

Every address in 57421 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources