Land for sale in West Virginia's Marion County recently totaled $27 million and around 2,000 acres. Marion County ranks 22nd in the state for the total number of acres of land currently advertised for sale. Among cities in Marion County with land for sale, Fairmont had the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of West Virginia. Marion County is West Virginia's 44th biggest county (311 square miles). It's located in the Northwest West Virginia region of West Virginia.