Union County, South Dakota ZIP Codes


ZIP Codes in Union County with Associated Cities & Towns

Union County, SD - Standard ZIP Codes
51001 | 51023 | 57001 | 57004 | 57010 | 57025 | 57034 | 57038 | 57049
Note: Every ZIP Code has a single ACTUAL City Name assigned by the US Postal Service (USPS).
See the specific ZIP Code for acceptable Alternate City Names and spelling variations.

ZIP Codes in Union County Address Data

  • Businesses Addresses: 970
  • PO Box Addresses: 1,339
  • Residential Addresses: 9,198
    • Multi-Family Addresses: 981
    • Single Family Addresses: 8,217


Map of Union County, SD ZIP Codes With Actual (Default) City Names

Elk Point
North Sioux City

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