Land for sale in Marion County, West Virginia, recently totaled nearly $30 million and around 2,000 acres. Marion County ranks 19th out of 55 counties in West Virginia for the combined amount of land currently advertised for sale. Of all land for sale in Marion County, Fairmont featured 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 the 44th biggest county (311 square miles) in West Virginia. It's located in the Northwest West Virginia region of West Virginia.