Despite the lack of a grid system of city blocks though the county, all street addresses have their numeric origin at the southwest corner of the town square in Marietta.
From here, the north/south boundary heads west on Georgia 120, which is Whitlock Avenue and Dallas Highway. All addresses actually on this road are considered "southwest", even on the north side of the street, To the east, it follows 120 (South Park Square, Roswell Street, and Roswell Road), then onto Lower Roswell Road, and finally skipping to Paper Mill Road across a roadless strip, and down a small section of Johnson Ferry Road to the river.
The east/west boundary follows Church Street and its extension north to Bell's Ferry Road, with all addresses on it being "northwest", even on the east side of the street. To the south, it follows an arbitrary path toward Mableton, usually running between roads instead of along them.
Because the USPS delivers mail from post offices in other counties in some places, it has assigned the names and ZIP codes of those cities to areas in Cobb. This creates a situation where an address can appear to be in southeast Atlanta, but is actually northwest of Atlanta in southeast Cobb, for example.
Towns and Cities in Cobb County
Acworth
Atlanta
Austell
Kennesaw
Marietta
Powder Springs
Smyrna
Adjacent Counties
Cherokee County, Georgia - north
Fulton County, Georgia - east, southeast
Douglas County, Georgia - south
Paulding County, Georgia - west
Bartow County, Georgia - northwest
