Land for sale in Clay County recently totaled around $3 million and nearly 1,000 acres. Clay County ranks 40th out of 55 counties in the state for the combined amount of land currently advertised for sale. Of all locations in Clay County with farms, hunting land and other rural land and acreage for sale, Clay had the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of West Virginia. Clay County is the 37th biggest county (343 square miles) in West Virginia. It's located in the Southwest West Virginia region of the state.