 About 8.0% of families and 11.9% of the population were below the poverty line, including 20.7% of those under age 18 and 9.3% of those age 65 or over.Fairmont has been home to Fairmont Railway Motors, Inc, now part of Harsco Corporation, for a century.The company pioneered motorized railway section cars, later road-rail technologies as well as track maintenance machinery that revolutionized and mechanized rail track engineering.