There was a combined $17 million of farms and ranches for sale in Highland County recently on Land.com. The total acreage of all Highland County land for sale was almost 1,000 acres. Highland County ranks 68th in Ohio for the combined amount of land currently advertised for sale. Of all locations in Highland County with ranches, farms, hunting land and other rural land and acreage for sale, Hillsboro had the most land for sale. Highland County is the 20th largest county (557 square miles) in Ohio. It's located in the Southeast Ohio region of the state.