The value of all farmsand rural real estate for sale in Georgia's Johnson County recently was $6 million, representing a combined 758 acres of land for sale in Johnson County. Johnson County ranks 148th in the Peach State for the total acreage of land currently advertised for sale. Of all locations in Johnson County with farms, hunting land and other rural land and acreage 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 biggest county (306 square miles) in Georgia. It's located in the Historic South Georgia region of the state.