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	Atlanta
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
• Estimate  (2023)	762,992
• 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–Roswell metropolitan 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 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.