DeKalb County, Georgia

DeKalb County
County
Stone Mountain Park
Flag Seal Logo
Location within the U.S. state of Georgia
Georgia's location within the U.S.
Coordinates: 33°46′N 84°14′W / 33.77°N 84.23°W / 33.77; -84.23
Country	United States
State	Georgia
Founded	December 9, 1822; 202 years ago (1822)
Named for	Johann de Kalb
Seat	Decatur
Largest city	Stonecrest[a]
Area
• Total	271 sq mi (700 km2)
• Land	268 sq mi (690 km2)
• Water	3.6 sq mi (9 km2)  1.3%
Population  (2020)
• Total	764,382
• Density	2,800/sq mi (1,100/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional districts	4th, 5th
Website	dekalbcountyga.gov

DeKalb County (/dəˈkæb/, /ˌdiːˈkæb/ də-KAB, DEE-KAB) is located in the north central portion of the U.S. state of Georgia. As of the 2020 census, the population was 764,382,^[1] making it Georgia's fourth-most populous county. Its county seat is Decatur.^[2]

DeKalb County is included in the Atlanta–Sandy Springs–Alpharetta, GA Metropolitan Statistical Area. It contains roughly 10% of the city of Atlanta (the other 90% lies in Fulton County).^[3] Stonecrest is the largest city that is entirely within the county. DeKalb is primarily a suburban county.

In 2009, DeKalb earned the Atlanta Regional Commission's "Green Communities" designation for its efforts in conserving energy, water and fuel, investing in renewable energy, reducing waste, and protecting and restoring natural resources.

In 2021, the non-profit American Rivers named DeKalb's South River the fourth-most endangered river in the United States, citing "the egregious threat that ongoing sewage pollution poses to clean water and public health."^[4]

In recent years, some communities in North DeKalb have incorporated, following a trend in other suburban areas around Metro Atlanta. Stonecrest, Dunwoody and Brookhaven are now the largest cities that are entirely contained within the county.

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