What are the Groton, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for GrotonZip CodePrimary CitySecondary City57445GrotonGroton, James, PutneyCities sharing Zip Codes with GrotonZip CodePrimary CitySecondary CityMore Information57445GrotonJames57445GrotonPutneyAdvertisements