South Fulton is a city in Fulton County, Georgia, United States in the Atlanta metropolitan area. It was incorporated in 2017 from parts of southwest Fulton County and includes the communities of Red Oak, Cooks Crossing, Stonewall, Fife, Ben Hill, Sandtown, Cliftondale, Ono, Cedar Grove, Boat Rock/Dry Pond, Maude, Lester, Enon, Welcome All, Peters Woods, and part of Campbellton. As of 2020, it had a population of 107,436, making it the state's eighth-largest city in population.