The value of all ranches, farms, hunting land and other rural land and acreage for sale in Boone County recently was approximately $112 million, representing a total of 736 acres of land for sale in Boone County. Boone County ranks 19th out of 120 counties in the state for the total number of acres of land currently advertised for sale. Among cities in Boone County with land and rural real estate for sale, Union featured the most land for sale. Boone County is the 84th biggest county (256 square miles) in Kentucky. It's located in the North Central Kentucky region of the state.