Decatur
- County:
- DeKalb County
- County Seat:
- Yes
- Area (mi²):
- 4.606
- State:
- Georgia
Decatur is a city located in DeKalb County, Georgia. Decatur has a 2026 population of 24,482. It is also the county seat of DeKalb County. Decatur is currently declining at a rate of -0.17% annually and its population has decreased by -1.69% since the most recent census, which recorded a population of 24,904 in 2020.