There was a combined almost $3 million of land for sale in Johnson County recently on Land.com. The total acreage of all Johnson County ranches, farms, hunting land and other rural land and acreage for sale was 1,000 acres. Johnson County ranks 55th in the state for the total number of acres of land currently advertised for sale. Among cities in Johnson County with land and rural real estate for sale, Tecumseh 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 90th largest county (376 square miles) in Nebraska. It's located in the Southeast Nebraska region of Nebraska.