Mableton is a city in Cobb County, Georgia, United States. Voters of the unincorporated area of Mableton approved a referendum to incorporate on November 8, 2022, and six council members were elected on March 21, 2023, with Michael Owens elected as mayor of Mableton in the 2023 Mableton mayoral election. According to the 2020 census, the census-designated area Mableton had a population of 37,115; the city has more. Upon Brookhaven's cityhood in December 2012, Mableton was previously the largest unincorporated CDP in Metro Atlanta. With boundaries described in Appendix A of House Bill 839, Mableton is the largest city in Cobb County in terms of population and includes historical Mableton, along with the Six Flags area, areas of unincorporated Smyrna, and parts of unincorporated South Cobb.

Cobb County is a county in the U.S. state of Georgia, located in the Atlanta metropolitan area in the north central portion of the state. As of 2020 Census, the population was 766,149. It is the state's third most populous county, after Fulton and Gwinnett counties. Its county seat is Marietta; its largest city is Mableton.