There are 3 zip codes in Hardin County, Illinois. The most populated is 62931, located in Elizabethtown. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
62931Elizabethtown1,335
62982Rosiclare1,131
62919Cave In Rock731

Hardin County, Illinois Zip Codes by Population (2024)