Williamson County is in Southern Illinois. Of the 102 counties in the Prairie State, Williamson County ranks 65th in terms of size (284,385 acres). The total value of approximately 1,000 acres of undeveloped land recently listed for sale in Williamson County, Illinois, was almost $8 million. The average price of undeveloped land for sale in Williamson County was $531,620. Some suggested uses for undeveloped land currently for sale in Williamson County include for hunting/fishing, commercial, and agriculture use. Some common wildlife species to be found on undeveloped land for sale in Williamson County include whitetail deer, turkey, deer, ducks and dove. Current commercial applications for commercial property for sale in Williamson County include for hunting/fishing, commercial and agriculture use. Browse all Illinois undeveloped land for sale on the Land Network to find your next commercial property or land investment.