There are 9 zip codes in Porter County, Indiana. The most populated is 46383, located in Valparaiso. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
4638341,811Valparaiso
4638541,304Valparaiso
4636839,947Portage
4630427,204Chesterton
463419,984Hebron
463474,853Kouts
46301578Beverly Shores
46393148Wheeler
4630251Boone Grove

Zip Codes in Porter County, Indiana by Population (2024)