City | Rank | 2026 Pop.↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Atlanta | 1 | 534,278 | 500,086 | 0.98% | 3,950 | 135 | City |
| Sandy Springs | 2 | 104,328 | 108,225 | -0.65% | 2,770 | 38 | City |
| Roswell | 3 | 91,308 | 92,949 | -0.22% | 2,243 | 41 | City |
| Johns Creek | 4 | 79,995 | 82,579 | -0.5% | 2,596 | 31 | City |
| Alpharetta | 5 | 67,211 | 65,962 | 0.43% | 2,499 | 27 | City |
| Milton | 6 | 41,268 | 41,400 | 0% | 1,072 | 39 | City |
| Duluth | 7 | 34,167 | 32,232 | 1.04% | 3,315 | 10 | City |
| Union City | 8 | 30,184 | 27,092 | 0.92% | 1,534 | 20 | City |
| Fairburn | 9 | 17,306 | 16,541 | 1.01% | 1,024 | 17 | City |
| Hapeville | 10 | 7,448 | 6,566 | 0.51% | 3,131 | 2 | City |
| Palmetto | 11 | 5,328 | 5,094 | 0.57% | 449 | 12 | City |
Atlanta is the largest city in Fulton County, with a population of 534,278.
Palmetto is the smallest city in Fulton County, with a population of 5,328.
There are 11 cities in Fulton County, Georgia.