What are the Milltown, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for MilltownZip CodePrimary CitySecondary City57366ParkstonMilltown, Beardsley, Marcy Colony,Cities sharing Zip Codes with MilltownZip CodePrimary CitySecondary CityMore Information57366ParkstonBeardsley57366ParkstonMarcy Colony57366ParkstonMilltownAdvertisements