Cobb County is in the Metro Atlanta travel region of Georgia. Its county seat is Marietta, and the U.S. Census Bureau estimates the county had 787,538 residents in 2024, up from 766,086 in 2020. It covers about 340 square miles of land and was created in 1832.
- County seatMarietta
- Population (2024 estimate)787,538
- Land area340 square miles
- Created1832
- Travel regionMetro Atlanta
Print it: download the printable Cobb County map (PDF), sized for standard letter paper (8.5 by 11 inches, portrait). Choose “actual size” or “fit to page” when you print.
Cities and Towns in Cobb County
Cobb County has 7 incorporated cities and towns. Populations are U.S. Census Bureau estimates for July 1, 2024, for the whole city, including any part in a neighboring county.
| City or town | 2024 population | Note |
|---|---|---|
| Mableton | 78,314 | |
| Marietta (county seat) | 63,122 | |
| Smyrna | 57,177 | |
| Kennesaw | 37,740 | |
| Acworth | 22,624 | |
| Powder Springs | 19,632 | |
| Austell | 8,244 | Partly in Douglas County |
Unincorporated communities marked on the map are Census-designated places, which have no city government: Fair Oaks, Kennesaw State University, Mableton and Vinings.
Highways
Interstates and U.S. highways come from Census road data; state route numbers come from the Georgia Department of Transportation’s road inventory. In Georgia most U.S. highways also carry a state route number, and where two routes share the same road GDOT records it under one of them.
- Interstates: I-20, I-75, I-285, I-575
- U.S. highways: US 41, US 78, US 278
- State routes (Georgia DOT inventory numbers): SR 3, SR 5, SR 6, SR 8, SR 92, SR 120, SR 139, SR 280, SR 360
Parks, Public Land and Water
Public land shown on the map:
- Kennesaw Mountain National Battlefield Park
- Chattahoochee River National Recreation Area
Lakes and rivers labeled on the map: Lake Allatoona, Lake Acworth, Chattahoochee River, Sweetwater Creek, Noses Creek, Allatoona Creek, Noonday Creek, Nickajack Creek and Sope Creek. Names follow the U.S. Geological Survey’s official Geographic Names Information System.
For county and city parks, playgrounds and recreation centers, see our Cobb County parks guide.
Neighboring Counties
Cobb County borders Bartow County, Cherokee County, Douglas County, Fulton County and Paulding County.
Common Questions
What is the county seat of Cobb County, Georgia?
Marietta is the county seat of Cobb County.
What cities are in Cobb County, Georgia?
Cobb County has 7 incorporated cities and towns: Mableton, Marietta, Smyrna, Kennesaw, Acworth, Powder Springs and Austell.
What counties border Cobb County?
Cobb County borders Bartow County, Cherokee County, Douglas County, Fulton County and Paulding County.
Is there a printable map of Cobb County?
Yes. The Cobb County map on this page is a free PDF sized for letter paper (8.5 by 11 inches, portrait) that you can print or save to your phone.
How many people live in Cobb County?
The U.S. Census Bureau estimates 787,538 people lived in Cobb County on July 1, 2024, up from 766,086 in 2020.
Sources we checked
This map and page were built in October 2026 from public data:
- U.S. Census Bureau: TIGER/Line 2023 (county lines, roads, water, place boundaries)
- U.S. Census Bureau: county and city population estimates, Vintage 2024
- U.S. Census Bureau: 2023 Gazetteer (land area)
- USGS: Protected Areas Database of the United States (PAD-US) 4.1 (national forests, refuges, WMAs)
- USGS: Geographic Names Information System (lake and river names)
- Georgia DNR 2026-27 Hunting Regulations (eRegulations) (current WMA list)