What are the Opal, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for OpalZip CodePrimary CitySecondary City57758Mud ButteOpal, Inland, ZeonaCities sharing Zip Codes with OpalZip CodePrimary CitySecondary CityMore Information57758Mud ButteOpal57758Mud ButteZeona57758Mud ButteInlandAdvertisements