Land for sale in Johnson County, Georgia, recently totaled approximately $4 million and approximately 1,000 acres. Johnson County ranks 147th in the state for the combined amount of land currently advertised for sale. Of all locations in Johnson County with land and rural real estate for sale, Wrightsville had 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 98th largest county (306 square miles) in Georgia. It's located in the Historic South Georgia region of the state.