What are the Glen, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for GlenZip CodePrimary CitySecondary City57471RoscoeGlen, Gretna, LoyaltonCities sharing Zip Codes with GlenZip CodePrimary CitySecondary CityMore Information57471RoscoeGlen57471RoscoeGretna57471RoscoeLoyaltonAdvertisements