The value of all farmsand rural real estate for sale in Johnson County recently was approximately $5 million, representing a combined 723 acres of land for sale in Johnson County. Johnson County ranks 147th in the Peach State for the total number of acres of land currently advertised for sale. Of all locations in Johnson County with farms and rural land for sale, Wrightsville 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 98th largest county (306 square miles) in Georgia. It's located in the Historic South Georgia region of Georgia.