There are 6 zip codes in Chickasaw County, Iowa. The most populated is 50659, located in New Hampton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
506595,986New Hampton
506582,427Nashua
506301,568Fredericksburg
506451,391Ionia
52154664Lawler
50603342Alta Vista

Zip Codes in Chickasaw County, Iowa by Population (2024)