What are the Mystic, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for MysticZip CodePrimary CitySecondary City57745Hill CityMystic, Deerfield, RochfordCities sharing Zip Codes with MysticZip CodePrimary CitySecondary CityMore Information57745Hill CityRochford57745Hill CityDeerfield57745Hill CityMysticAdvertisements