There was a total of $83 million of land for sale in Johnson County, Missouri, recently on Land.com. The total size of all Johnson County farms, ranches, hunting land and other land for sale was 2,000 acres. Johnson County ranks 24th in the Ozark State for the total acreage of land currently advertised for sale. Among cities in Johnson County with land and rural real estate for sale, Warrensburg featured the most land for sale. Government and state-level services are the main economic drivers in Johnson County. 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.