What are the Summerset, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for SummersetZip CodePrimary CitySecondary City57718Black HawkSummerset57769PiedmontSummerset, Grashul, Tilford, BethlehemCities sharing Zip Codes with SummersetZip CodePrimary CitySecondary CityMore Information57718Black HawkSummerset Summerset population stats 57769PiedmontBethlehem57769PiedmontGrashul57769PiedmontTilford57769PiedmontSummerset Summerset population stats Advertisements