Atlanta is the capital and most populous city of the U.S. state of Georgia. It serves as the county seat of Fulton County and extends into neighboring DeKalb County. As of the 2020 census, the city had a population of 498,715, with an estimated population of 529,110 in 2025. It ranks as the eighth-most populous city in the Southeast and the 36th-most populous city in the United States.
The Atlanta metropolitan area is the sixth-largest in the United States, with an estimated population exceeding 6.4 million people. Classified as a Beta+ global city, Atlanta is situated among the foothills of the Appalachian Mountains at an elevation of just over 1,000 feet above sea level. The city's topography is characterized by rolling hills and lush greenery, featuring the densest urban tree coverage of any major city in the United States.