Grant Town is a town in Marion County, West Virginia, in the eastern United States. The population was 613 at the 2010 census.The town was formed in 1901 with the opening of the Federal Coal and Coke Company bituminous coal mine, and was named for Robert Grant, vice president of the coal company. The "Federal No. 1" mine [2] remained open for the next 84 years until its closure in 1985. At one point it was the largest underground coal mine in the world in terms of gross production, mining the Pittsburgh coal seam. The town was incorporated as a municipality in 1946.Grant Town is the site of an 80 Megawatt electrical generation facility, located adjacent to the coal refuse areas above the town. The plant, which was built in the early 1990s is controlled by Edison International and generates electricity using a fluidized bed combustion boiler process burning waste coal.