Powder Springs is a city in Cobb County, Georgia, United States. The population was 13,940 at the 2010 census. Powder Springs is a quaint community about 20 miles west of downtown Atlanta. In the 1850s Powder Springs became known as a health resort. Since the water from these springs could not be transported, people came from great distances to partake. The total area of the City of Powder Springs is 7.181 square miles.