What are the Parkston, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for ParkstonZip CodePrimary CitySecondary City57366ParkstonParkston, Beardsley, Marcy Colony, MilltownCities sharing Zip Codes with ParkstonZip CodePrimary CitySecondary CityMore Information57366ParkstonBeardsley57366ParkstonMarcy Colony57366ParkstonMilltownAdvertisements