There are 22 zip codes in Linn County, Iowa. The most populated is 52302, located in Marion. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5230242,803Marion
5240242,648Cedar Rapids
5240441,433Cedar Rapids
5240526,259Cedar Rapids
5240324,191Cedar Rapids
524118,242Cedar Rapids
522337,025Hiawatha
523146,011Mount Vernon
522133,869Center Point
522283,656Fairfax
523282,962Robins
522272,825Ely
522142,790Central City
523362,442Springville
524012,172Cedar Rapids
523242,139Palo
523521,775Walker
522181,709Coggon
522021,267Alburnett
523411,154Toddville
52219180Prairieburg
52344100Troy Mills

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