The combined value of farms, rural land, hunting land and other land for sale in Georgia's Johnson County recently on Land.com was $5 million. This represents nearly 1,000 acres of farms and rural land for sale in Johnson County. Johnson County ranks 152nd in the Peach 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 biggest county (306 square miles). It's located in the Historic South Georgia region of Georgia.