Land for sale in Johnson County, Illinois, recently totaled $14 million and 3,000 acres. Johnson County ranks 57th in the state for the combined amount 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 $2,550,000. Among cities in Johnson County with farms, rural land, hunting land and other land for sale, Goreville featured the most land for sale. From an economic perspective, government and state-level services contribute most to Johnson County's overall GDP. Johnson County is the 84th largest county (348 square miles) in Illinois. It's located in the Southern Illinois region of Illinois.