Grant Town is a town in Marion County, West Virginia, in the eastern United States. The population was 690 at the 2020 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 remained open for the next 84 years until its closure in 1985.