There are 7 zip codes in Union County, Illinois. The most populated is 62906, located in Anna. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
629067,217Anna
629523,050Jonesboro
629203,017Cobden
629262,167Dongola
62905583Alto Pass
62998198Wolf Lake
6296145Millcreek

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