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.

Zip Code
City
Population
62812Benton11,396
62896West Frankfort10,959
62884Sesser2,809
62822Christopher2,597
62890Thompsonville2,338
62865Mulkeytown1,894
62983Royalton1,521
62999Zeigler1,520
62836Ewing913
62891Valier700
62897Whittington530
62860Macedonia468
62856Logan351
62874Orient335
62819Buckner267
62825Coello243

Franklin County, Illinois Zip Codes by Population (2024)