39 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Atlanta | 1 | 525,088 | 498,792 | 0.96% | 3,882 | 135 | City |
| Atlanta | 2 | 525,088 | 499,998 | 0.96% | 3,882 | 135 | City |
| Stonecrest | 3 | 61,451 | 59,189 | 0.71% | 1,643 | 37 | City |
| Stonecrest | 4 | 61,451 | 59,269 | 0.71% | 1,643 | 37 | City |
| Brookhaven | 5 | 60,018 | 56,761 | 1.09% | 4,893 | 12 | City |
| Brookhaven | 6 | 60,018 | 56,777 | 1.09% | 4,893 | 12 | City |
| Dunwoody | 7 | 51,844 | 51,645 | 0.09% | 3,980 | 13 | City |
| Dunwoody | 8 | 51,844 | 51,596 | 0.09% | 3,980 | 13 | City |
| East Point | 9 | 38,237 | 38,362 | -0.09% | 2,595 | 15 | City |
| East Point | 10 | 38,237 | 38,400 | -0.09% | 2,595 | 15 | City |
| Tucker | 11 | 37,240 | 37,119 | 0.04% | 1,842 | 20 | City |
| Tucker | 12 | 37,240 | 37,159 | 0.04% | 1,842 | 20 | City |
| Chamblee | 13 | 32,848 | 30,150 | 1.63% | 4,270 | 8 | City |
| Chamblee | 14 | 32,848 | 30,212 | 1.63% | 4,270 | 8 | City |
| Redan | 15 | 30,904 | 34,870 | -0.45% | 3,821 | 8 | CDP |
| Decatur | 16 | 24,376 | 24,938 | -0.43% | 5,292 | 5 | City |
| Decatur | 17 | 24,376 | 24,904 | -0.43% | 5,292 | 5 | City |
| Candler-McAfee | 18 | 22,628 | 24,419 | -0.11% | 3,250 | 7 | CDP |
| North Decatur | 19 | 17,304 | 15,833 | 0.23% | 3,524 | 5 | CDP |
| North Druid Hills | 20 | 16,814 | 18,074 | -0.84% | 4,275 | 4 | CDP |
| Belvedere Park | 21 | 14,410 | 15,028 | -0.34% | 2,942 | 5 | CDP |
| Clarkston | 22 | 14,336 | 14,756 | -0.55% | 7,770 | 2 | City |
| Clarkston | 23 | 14,336 | 14,733 | -0.55% | 7,770 | 2 | City |
| Doraville | 24 | 12,890 | 10,624 | 3.65% | 2,579 | 5 | City |
| Doraville | 25 | 12,890 | 10,617 | 3.65% | 2,579 | 5 | City |
| Scottdale | 26 | 10,550 | 11,196 | -0.05% | 3,171 | 3 | CDP |
| Panthersville | 27 | 9,059 | 10,164 | -0.51% | 2,470 | 4 | CDP |
| Gresham Park | 28 | 7,912 | 9,148 | 0.41% | 2,819 | 3 | CDP |
| Druid Hills | 29 | 6,942 | 8,525 | -6.82% | 2,326 | 3 | CDP |
| Stone Mountain | 30 | 6,516 | 6,701 | -0.55% | 3,947 | 2 | City |
| Stone Mountain | 31 | 6,516 | 6,693 | -0.55% | 3,947 | 2 | City |
| Avondale Estates | 32 | 3,517 | 3,565 | -0.26% | 2,876 | 1 | City |
| Avondale Estates | 33 | 3,517 | 3,559 | -0.26% | 2,876 | 1 | City |
| Lakeview Estates | 34 | 2,719 | 2,546 | 0.07% | 5,352 | 1 | CDP |
| Lithonia | 35 | 2,561 | 2,663 | -0.77% | 2,760 | 1 | City |
| Lithonia | 36 | 2,561 | 2,658 | -0.77% | 2,760 | 1 | City |
| Milstead | 37 | 1,012 | 727 | 7.09% | 2,316 | 0 | CDP |
| Pine Lake | 38 | 747 | 771 | -0.66% | 3,152 | 0 | City |
| Pine Lake | 39 | 747 | 770 | -0.66% | 3,152 | 0 | City |
Atlanta is the largest city in DeKalb County, with a population of 525,088.
Pine Lake is the smallest city in DeKalb County, with a population of 747.
There are 39 cities in DeKalb County, Georgia.