Metro Atlanta, designated by the United States Office of Management and Budget as the Atlanta–Sandy Springs–Roswell metropolitan statistical area, is the most populous metropolitan statistical area in the U.S. state of Georgia and the eighth-largest in the United States, based on the July 1, 2024 population estimates from the U.S. Census Bureau. Its economic, cultural, and demographic center is Atlanta, and its total population was 6,411,149 in the 2024 estimate from the U.S. Census Bureau.

The core 5 counties of metropolitan Atlanta are Fulton, Gwinnett, Cobb, DeKalb, and Clayton, with over 60% of the metro area’s population residing in these counties. The metro area forms the core of a broader trading area, the Atlanta–Athens-Clarke County–Sandy Springs combined statistical area. The combined statistical area spans up to 39 counties in North Georgia. The CSA recorded in the 2020 U.S. census a population of 6,930,423. One in ten (10.7%) of residents served by the Atlanta Regional Commission (including the core 5 counties of the metropolitan area) live within Atlanta city limits.

By U.S. Census Bureau standards, the population of the Atlanta region spreads across a metropolitan area of 8,376 square miles (21,694 km²), comparable to the size of Palestine. Because Georgia contains more counties than any other state except Texas (explained in part by the now-defunct county-unit system of weighing votes in primary elections), area residents live under a heavily decentralized collection of governments. As of the 2000 census, fewer than one in ten residents of the metropolitan area lived inside Atlanta city limits.

A 2006 survey by the Metro Atlanta Chamber of Commerce counted 140 cities and towns in the 28‑county Metropolitan Statistical Area in mid-2005. Eleven cities – Johns Creek (2006), Milton (2006), Chattahoochee Hills (2007), Dunwoody (2008), Peachtree Corners (2012), Brookhaven (2012), Tucker (2016), Stonecrest (2016), South Fulton (2017), Mableton (2022) and Mulberry (2024) – have incorporated since then, following the lead of Sandy Springs in 2005.

The Atlanta metropolitan area was first defined in 1950 as Fulton, DeKalb, Gwinnett, Cobb and Clayton counties. Walton, Newton, Douglas, Fayette, Forsyth, Henry, Cherokee, Rockdale, and Butts counties were added after the 1970 census, with Barrow and Coweta counties joining in 1980 and Bartow, Carroll, Paulding, Pickens and Spalding counties in 1990.

Atlanta's larger combined statistical area adds the Gainesville and Athens metropolitan areas plus LaGrange, Thomaston, Jefferson, Calhoun, and Cedartown micropolitan areas, for a total 2012 population of 6,162,195. The CSA also abuts the Macon and Columbus MSAs. The region is one of the metropolises of the Southeastern United States, and is part of the emerging megalopolis known as Piedmont Atlantic Megaregion along the I-85 Corridor.

The counties listed below are included in the Atlanta–Sandy Springs–Roswell metropolitan statistical area. In 2023, the Office of Management and Budget split the Metropolitan statistical area into two conurbated metropolitan divisions.

The Atlanta-Sandy Springs-Roswell metropolitan division consists of the following 24 counties: