A total of nearly 1,000 acres were listed for sale in West Virginia's Clay County recently, representing a total value of $2 million in Clay County farmsand rural real estate for sale. Clay County ranks 46th in the Mountain State for the total acreage of land currently advertised 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 West Virginia's 37th biggest county (343 square miles). It's located in the Southwest West Virginia region of West Virginia.