Cerro Gordo County, Iowa Zip Codes by Population (2024)

The most populated Zip Code in Cerro Gordo County, Iowa is 50401, located in Mason City. * 2024 populations estimated based on the latest ACS 5-year data.

Zip Code
City
Population
50401Mason City28,909
50428Clear Lake9,119
50469Rockwell1,647
50479Thornton736
50482Ventura692
50464Plymouth512
50477Swaledale215
50433Dougherty181
50467Rock Falls103