The value of farms and ranches for sale in Boone County recently on Land.com was around $98 million. This represents around 1,000 acres of farms and ranches for sale in Boone County. Boone County ranks 23rd in the Bluegrass State for the total number of acres of land currently advertised for sale. Among cities in Boone County with ranches, farms, hunting land and other rural land and acreage for sale, Union featured the most land for sale. Boone County is the 84th largest county (256 square miles) in Kentucky. It's located in the North Central Kentucky region of Kentucky.