There are 12 zip codes in Jefferson County, Illinois. The most populated is 62864, located in Mount Vernon. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
6286423,253Mount Vernon
628462,026Ina
628981,955Woodlawn
628141,782Bluford
628301,338Dix
628721,112Opdyke
628891,111Texico
628161,104Bonnie
628101,032Belle Rive
62893927Walnut Hill
62894841Waltonville
62883594Scheller

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