Chickasaw County, Iowa ZIP Codes

6 ZIP Codes

Zip Code
City
Population ↓
50659New Hampton5,688
50658Nashua2,450
50630Fredericksburg1,372
50645Ionia1,193
52154Lawler592
50603Alta Vista555

Overview of ZIP Codes in Chickasaw 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.
6
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 6 ZCTAs in Chickasaw County, Iowa (US Census).

Sources

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

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