Williamson County and REDCO
The current population of Williamson County is over 66,000, making it one of the largest counties in Illinois outside of the metro areas of major population centers. Marion, located in the geographic center of both the county and southern Illinois, is the county seat and the largest community at over 17,000.

Williamson County is located 88 air miles (120 miles by interstate) southeast of St. Louis, MO at the intersection of Interstate 57, Interstate 24, and Illinois Route 13. The latter highway, a main east-west 4-lane expressway, connects the major communities of Murphysboro, Carbondale, Carterville, Herrin, Marion, and Harrisburg, while the north-south Interstate 57 connects Mt. Vernon, Benton, West Frankfort and Marion. More than 150,000 people make their homes in Williamson and the adjacent counties and over a quarter of a million live within an hour’s drive of the county, making it a retail and commercial hub for the area. 

The people of Williamson County are proud of their area, their heritage, their families and their reputation for being good workers.  Since 1999 Redco has been a major player in bringing industry, investment and employment to Williamson County and Southern Illinois.  

  • 3 million square feet of new industrial space

  • $300 million invested in new facilities & equipment

  • 3000 new jobs for willing and well-trained workers

    Click on one of the videos to find out more about industrial opportunities in Williamson County.    




Promoting economic growth and industrial development in Williamson County and Southern Illinois.
The Regional Economic Development Corporation is an equal opportunity provider.