There are 16 zip codes in Franklin County, Illinois. The most populated is 62812, located in Benton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
6281211,396Benton
6289610,959West Frankfort
628842,809Sesser
628222,597Christopher
628902,338Thompsonville
628651,894Mulkeytown
629831,521Royalton
629991,520Zeigler
62836913Ewing
62891700Valier
62897530Whittington
62860468Macedonia
62856351Logan
62874335Orient
62819267Buckner
62825243Coello

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