Jefferson County is in Southern Illinois. Of the 102 counties in the Prairie State, Jefferson County ranks 41st in terms of size (583 square miles). Recent listings of undeveloped land for sale in Jefferson County, Illinois, totals nearly 1,000 acres and a combined market value of around $1 million. The most common type of land for sale by combined acreage in Jefferson County is residential property. The average price of undeveloped land for sale in Jefferson County was $168,687. Some suggested uses for undeveloped land currently for sale in Jefferson County include for commercial, hunting/fishing, and agriculture use. Some common wildlife species to be found on undeveloped land for sale in Jefferson County include whitetail deer, turkey, deer, dove, quail and ducks. Current commercial applications for commercial property for sale in Jefferson County include for commercial, hunting/fishing and agriculture use. Browse all Illinois undeveloped acreage for sale on the Land Network to find your next commercial property or land investment.