There are 13 zip codes in Marshall County, Iowa. The most populated is 50158, located in Marshalltown. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5015831,047Marshalltown
502472,411State Center
501621,302Melbourne
501061,182Gilman
50005859Albion
50142790Le Grand
50120537Haverhill
50141499Laurel
50234482Rhodes
50148376Liscomb
50051277Clemons
50239139Saint Anthony
50078102Ferguson

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