There are 16 zip codes in Henry County, Illinois. The most populated is 61443, located in Kewanee. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
6144313,584Kewanee
6125412,103Geneseo
612416,775Colona
612733,175Orion
614342,986Galva
612382,985Cambridge
612351,464Atkinson
614901,103Woodhull
612341,073Annawan
614131,012Alpha
61262734Lynn Center
61274269Osco
61233253Andover
61468190Ophiem
61258188Hooppole
61419151Bishop Hill

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