What are the Interior, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for InteriorZip CodePrimary CitySecondary City57750InteriorInterior, Potato Creek, Headlee RanchCities sharing Zip Codes with InteriorZip CodePrimary CitySecondary CityMore Information57750InteriorHeadlee Ranch57750InteriorPotato CreekAdvertisements