What are the North Sioux City, South Dakota Zip Codes for 2020, 2019Primary Zip Codes for North Sioux CityZip CodePrimary CitySecondary City57049North Sioux CityNorth Sioux City, Mccook Lake, N Sioux City, Dakota DunesCities sharing Zip Codes with North Sioux CityZip CodePrimary CitySecondary CityMore Information57049North Sioux CityMccook Lake57049North Sioux CityN Sioux City57049North Sioux CityDakota Dunes Dakota Dunes population stats Advertisements