A total of almost 1,000 acres were listed for sale in Georgia's Johnson County recently; the value of all Johnson County land and rural real estate for sale was around $6 million. Johnson County ranks 151st in the state for the total acreage of land currently advertised 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 Georgia's 98th largest county (306 square miles). It's located in the Historic South Georgia region of Georgia.