Coal Mountain, Georgia
Coal Mountain is an unincorporated community in Forsyth County, Georgia, United States. The Coal Mountain area lies at the intersection of GA-369 and SR-9. It was once home to a post office that served the small community. History. A post office was in operation at Coal Mountain from 1834 until 1907. The community's name most likely came from a local Cole (or Coal) family, as this part of Georgia has no coal deposits.