What are the Folsom, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for FolsomZip CodePrimary CitySecondary City57744HermosaFolsom, Hayward, Red ShirtCities sharing Zip Codes with FolsomZip CodePrimary CitySecondary CityMore Information57744HermosaFolsom57744HermosaHayward57744HermosaRed ShirtAdvertisements