A combined 2,000 acres were listed for sale in Warren County recently; the value of all Warren County ranches, farms, hunting land and other rural land and acreage for sale was approximately $193 million. Warren County ranks 11th out of 88 counties in Ohio for the total acreage of land currently advertised for sale. Lebanon featured the most land for sale. Warren County is Ohio's 78th biggest county (407 square miles). It's located in the Southwest Ohio region of Ohio.