Smyrna is located in
Cobb County just northwest of
Atlanta between
Marietta and Marbleton along Highway 280 on the banks of the Chattahoochee River near Dobbins Air Force Base in the
Metro Atlanta Region of the state. The population estimate for July 1, 1998 was 35,899, an increase of 3,446 since 1990.
Smyrna is part of the Atlanta, Georgia metro area.