Harrison County, Iowa ZIP Codes

10 ZIP Codes

Zip Code
City
Population ↓
51555Missouri Valley4,952
51546Logan3,114
51579Woodbine2,282
51529Dunlap1,732
51557Mondamin828
51563Persia629
51564Pisgah520
51545Little Sioux267
51556Modale266
51550Magnolia169

Overview of ZIP Codes in Harrison County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
10
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 10 ZCTAs in Harrison County, Iowa (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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