The total value of farms and ranches for sale in Darke County, Ohio, recently on Land.com was nearly $14 million. This represents approximately 1,000 acres of ranches, farms, hunting land and other rural land and acreage for sale in Darke County. Darke County ranks 63rd out of 88 counties in the Buckeye State for the total acreage of land currently advertised for sale. Of all locations in Darke County with farms, ranches, hunting land and other land for sale, Greenville had the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Darke County. Darke County is the 13th largest county (599 square miles) in Ohio. It's located in the Southwest Ohio region of Ohio.