What are the Loyalton, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for LoyaltonZip CodePrimary CitySecondary City57471RoscoeLoyalton, Glen, Gretna,Cities sharing Zip Codes with LoyaltonZip CodePrimary CitySecondary CityMore Information57471RoscoeGlen57471RoscoeGretna57471RoscoeLoyaltonAdvertisements