Decatur, GA utilizes an area code overlay in which area codes 404, 470 and 678 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Decatur, GA area code information read more about area codes 470, 678 and 404 details and Georgia area codes.
Decatur, GA is located in DeKalb County and observes the Eastern Time Zone. View our Times by Area Code tool.