PlainZIP

Union

South Dakota

4

Total ZIPs

11,923

Total Population

ZIP Codes in Union

ZIP Code City Population Density
57049 North Sioux City 5,789 158
57025 Elk Point 2,795 8
57001 Alcester 1,672 5
57038 Jefferson 1,667 12

All data sourced from the U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2023).

PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.