Monona County, Iowa ZIP Codes

9 ZIP Codes

Zip Code
City
Population ↓
51040Onawa3,500
51034Mapleton1,674
51063Whiting1,072
51060Ute706
51558Moorhead549
51010Castana425
51523Blencoe379
51572Soldier371
51051Rodney39

Overview of ZIP Codes in Monona 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.
9
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 9 ZCTAs in Monona County, Iowa (US Census).

Sources

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

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