There are 11 zip codes in Franklin County, Iowa. The most populated is 50441, located in Hampton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
504415,321Hampton
506012,468Ackley
504751,563Sheffield
50452971Latimer
50420403Alexander
50633344Geneva
50431206Coulter
50605139Aredale
50427137Chapin
50227103Popejoy
5004198Bradford

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