There are 16 zip codes in Hancock County, Illinois. The most populated is 62321, located in Carthage. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
623213,717Carthage
623413,453Hamilton
623791,800Warsaw
614501,756La Harpe
623301,472Dallas City
623541,435Nauvoo
623671,349Plymouth
62316876Bowen
62311777Augusta
62358513Niota
62380452West Point
62313330Basco
62373267Sutter
62374211Tennessee
62334166Elvaston
6233694Ferris

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