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