Franklin County is a county in Southern Illinois. At the 2020 census, it had a population of 37,804. The largest city is West Frankfort and the county seat is Benton. This area of Southern Illinois is known locally as "Little Egypt".

West Frankfort is a city in Franklin County, Illinois. The population was 7,275 at the 2020 census. The city is well known for its rich history of coal. The city is part of the Metro Lakeland area.