The combined value of farms, hunting land and other rural land and acreage for sale in Johnson County, Illinois, recently on Land.com was around $15 million. This represents 3,000 acres of farms and rural real estate for sale in Johnson County. Johnson County ranks 50th in the Land of Lincoln for the total number of acres of land currently advertised for sale. There were two properties listed as sold in Johnson County through the Land Network Comparable Sales Program. This represented a total value of $447,500. Goreville featured the most land for sale. Government and state-level services are the main economic drivers in Johnson County. Johnson County is Illinois's 84th biggest county (348 square miles). It's located in the Southern Illinois region of Illinois.