Cobb County, Georgia
County seat: Marietta · Population 793,345 (2025) · 340 sq mi
Cobb County is the 3rd most populous of Georgia's 159 counties, with 793,345 people (2025 estimate). Its county seat is Marietta. It is part of the Atlanta region, one of the 12 Georgia Regional Commissions. The map shows its 8 cities and towns and the 5 neighboring counties.
Cobb County facts
- County seat
- Marietta
- Population (2025 estimate)
- 793,345 +3.6% since 2020
- Land area
- 340 sq mi 83rd largest of 159
- Water area
- 5 sq mi
- Population density
- 2,335 per sq mi
- Established
- 1832
- Largest city
- Mableton 78,820
- Median household income
- $102,738
- Cities and towns
- 8 plus 3 CDPs
- ZIP codes
- 25
- Time zone
- Eastern
- FIPS code
- 13067
Cities and towns in Cobb County
Cobb County has 8 incorporated cities, towns and villages. Populations count the people living inside Cobb County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Mableton | City | 78,820 | |
| Marietta (county seat) | City | 63,574 | |
| Smyrna | City | 57,513 | |
| Kennesaw | City | 37,970 | |
| Acworth | City | 22,925 | |
| Powder Springs | City | 21,004 | |
| Austell | City | 8,203 | Douglas County |
| Roswell | City | 0 | Fulton County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Vinings | 14,390 | |
| Fair Oaks | 9,014 | |
| Kennesaw State University | 2,284 |
ZIP codes in Cobb County
25 ZIP codes reach into Cobb County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 30008
- 30060
- 30062
- 30064
- 30066
- 30067
- 30068
- 30075 also Fulton and Cherokee counties
- 30080
- 30082
- 30090
- 30101 also Paulding, Bartow and Cherokee counties
- 30102 also Cherokee and Bartow counties
- 30106 also Douglas County
- 30111
- 30122 also Douglas County
- 30126
- 30127 also Paulding County
- 30141 also Paulding County
- 30144
- 30152
- 30157 also Paulding County
- 30168 also Douglas County
- 30188 also Cherokee County
- 30339 also Fulton County
Population of Cobb County, 2020–2025
Cobb County grew by 27,257 people (+3.6%) between April 2020 and July 2025: 18,299 more births than deaths and a net gain of 8,832 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 766,385 |
| 2021 | 767,036 |
| 2022 | 774,481 |
| 2023 | 781,435 |
| 2024 | 788,879 |
| 2025 | 793,345 |
Neighboring counties
- Fulton County southeast · 1,098,791 people
- Paulding County west · 190,996 people
- Cherokee County north · 299,273 people
- Douglas County southwest · 154,293 people
- Bartow County northwest · 120,800 people
Printable Cobb County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (110 KB)
- PNG (2400 px) (87 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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