What are the Howard, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for HowardZip CodePrimary CitySecondary City57349HowardHoward, Argonne, Vilas, RoswellCities sharing Zip Codes with HowardZip CodePrimary CitySecondary CityMore Information57349HowardRoswell57349HowardArgonne57349HowardVilasAdvertisements