What are the Gregory, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for GregoryZip CodePrimary CitySecondary City57533GregoryGregory, Carlock, Dixon, IonaCities sharing Zip Codes with GregoryZip CodePrimary CitySecondary CityMore Information57533GregoryDixon57533GregoryIona57533GregoryCarlockAdvertisements