8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Adel | 1 | 5,799 | 5,555 | 0.82% | 624 | 9 | City |
| Adel | 2 | 5,799 | 5,563 | 0.82% | 624 | 9 | City |
| Sparks | 3 | 2,070 | 2,059 | 0.1% | 522 | 4 | Town |
| Sparks | 4 | 2,070 | 2,058 | 0.1% | 522 | 4 | Town |
| Lenox | 5 | 744 | 754 | -0.27% | 467 | 2 | Town |
| Lenox | 6 | 744 | 753 | -0.27% | 467 | 2 | Town |
| Cecil | 7 | 284 | 287 | -0.35% | 297 | 1 | City |
| Cecil | 8 | 284 | 289 | -0.35% | 297 | 1 | City |
Adel is the largest city in Cook County, with a population of 5,799.
Cecil is the smallest city in Cook County, with a population of 284.
There are 8 cities in Cook County, Georgia.