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ZIP Code 57445 – Groton, SD

Groton, South Dakota · Brown County · Central time

ZIP code57445
CityGroton
StateSouth Dakota
CountyBrown County
Area code605
Population2,072
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area253.89 sq mi
Center (lat, long)45.4655, -98.1150

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Nearby ZIP codes

57439 Ferney · 9.1 mi57422 Andover · 9.5 mi57427 Bath · 9.9 mi57402 Aberdeen · 14.3 mi57474 Stratford · 14.4 mi57433 Columbia · 15.5 mi57432 Claremont · 15.5 mi57468 Pierpont · 18.1 mi

About ZIP 57445

ZIP code 57445 is assigned to Groton, South Dakota. It lies in Brown County. Its Census area covers about 253.89 square miles of land. The closest neighboring ZIP is 57439 (Ferney), about 9.1 miles away.

Every address in 57445 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