Marietta, GA utilizes an area code overlay in which area codes 470, 678 and 770 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Marietta, GA area code information view area codes 470, 678 and 770 details and Georgia area codes.
Marietta, GA is located in Cobb County and observes the Eastern Time Zone. View our Times by Area Code tool.