There are 14 zip codes in Brown County, South Dakota. The most populated is 57401, located in Aberdeen. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5740132,217Aberdeen
574451,910Groton
57446628Hecla
57441607Frederick
57479599Warner
57427438Bath
57481375Westport
57433355Columbia
57449333Houghton
57460321Mansfield
57432239Claremont
57474234Stratford
5742648Barnard
5743922Ferney

Zip Codes in Brown County, South Dakota by Population (2024)