| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Forest Park | 1 | 19,047 | 19,777 | -0.63% | 2,066 | 9 | City |
| Riverdale | 2 | 14,528 | 15,012 | -0.74% | 3,309 | 4 | City |
| College Park | 3 | 13,900 | 13,898 | 0.09% | 1,245 | 11 | City |
| Lovejoy | 4 | 13,510 | 10,091 | 4.49% | 4,647 | 3 | City |
| Morrow | 5 | 6,135 | 6,522 | -1.22% | 1,757 | 3 | City |
| Jonesboro | 6 | 6,074 | 5,959 | 0.46% | 2,030 | 3 | City |
| Lake City | 7 | 2,847 | 2,956 | -0.66% | 1,536 | 2 | City |
| Woolsey | 8 | 209 | 204 | 0.48% | 256 | 1 | Town |
Forest Park is the largest city in Clayton County, with a population of 19,047.
Woolsey is the smallest city in Clayton County, with a population of 209.
There are 8 cities in Clayton County, Georgia.