There are 12 zip codes in Marion County, Iowa. The most populated is 50219, located in Pella. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5021913,940Pella
5013812,086Knoxville
502253,211Pleasantville
50044887Bussey
50062859Melcher Dallas
50214730Otley
50163663Melcher Dallas
50256519Tracy
50119356Harvey
50057244Columbia
50252244Swan
50116191Hamilton

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