There was a combined almost $81 million of land for sale in Johnson County, Missouri, recently on Land.com. The total of all Johnson County ranches, farms, hunting land and other rural land and acreage for sale was nearly 3,000 acres. Johnson County ranks 29th out of 115 counties in Missouri for the combined amount of land currently advertised for sale. Of all locations in Johnson County with farms and ranches for sale, Warrensburg 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 one of the ten biggest counties in Missouri (833 square miles). It's located in the Central Missouri region of the state.