There are 21 cities in Cobb County, Georgia.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sandy Springs | 1 | 105,001 | 108,167 | -0.75% | 2,788 | 37.7 | City |
| Roswell | 2 | 91,293 | 92,944 | -0.45% | 2,242 | 40.7 | City |
| Marietta | 3 | 63,341 | 61,051 | 0.91% | 2,695 | 23.5 | City |
| Smyrna | 4 | 56,699 | 56,167 | 0.24% | 3,545 | 16.0 | City |
| Mableton | 5 | 42,402 | 41,647 | 0.9% | 2,077 | 20.4 | CDP |
| Milton | 6 | 41,379 | 41,393 | -0.01% | 1,075 | 38.5 | City |
| Douglasville | 7 | 40,468 | 34,790 | 3.63% | 1,763 | 23.0 | City |
| Woodstock | 8 | 39,548 | 35,247 | 2.79% | 3,053 | 13.0 | City |
| Kennesaw | 9 | 35,122 | 33,364 | 1.27% | 3,599 | 9.8 | City |
| Cartersville | 10 | 25,511 | 23,213 | 2.3% | 892 | 28.6 | City |
| Acworth | 11 | 22,363 | 22,425 | -0.07% | 2,448 | 9.1 | City |
| Holly Springs | 12 | 20,513 | 16,620 | 4.98% | 2,832 | 7.2 | City |
| Powder Springs | 13 | 19,630 | 16,910 | 3.59% | 2,513 | 7.8 | City |
| Lithia Springs | 14 | 16,108 | 17,545 | 0.27% | 1,195 | 13.5 | CDP |
| Dallas | 15 | 15,265 | 14,144 | 1.87% | 1,915 | 8.0 | City |
| Vinings | 16 | 13,482 | 12,546 | 2.02% | 4,313 | 3.1 | CDP |
| Fair Oaks | 17 | 9,846 | 9,447 | 1.19% | 5,044 | 2.0 | CDP |
| Austell | 18 | 8,241 | 7,867 | 1.14% | 1,300 | 6.3 | City |
| Hiram | 19 | 5,485 | 4,957 | 2.47% | 1,395 | 3.9 | City |
| Kennesaw State University | 20 | 3,082 | 3,568 | 7.69% | 7,862 | 0.4 | CDP |
| Mountain Park | 21 | 567 | 586 | -0.87% | 1,227 | 0.5 | City |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Sandy Springs is the largest city in Cobb County.
Mountain Park is the smallest city in Cobb County.
There are 21 cities in Cobb County, Georgia.