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
Population
City
629311,335Elizabethtown
629821,131Rosiclare
62919731Cave In Rock
showing: 3 rows

Zip Codes in Hardin County, Illinois by Population (2024)