What are the Millboro, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for MillboroZip CodePrimary CitySecondary City57580WinnerMillboro, Mosher, Weaver, Carter, Clearfield, Keyapaha, WewelaCities sharing Zip Codes with MillboroZip CodePrimary CitySecondary CityMore Information57580WinnerCarter57580WinnerClearfield57580WinnerKeyapaha57580WinnerMillboro57580WinnerWewela57580WinnerMosher57580WinnerWeaverAdvertisements