11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Forest Park | 1 | 19,091 | 19,783 | -0.72% | 2,071 | 9.22 | City |
| Riverdale | 2 | 14,448 | 15,007 | -0.77% | 3,291 | 4.39 | City |
| College Park | 3 | 13,827 | 13,926 | -0.14% | 1,238 | 11.17 | City |
| Lovejoy | 4 | 13,282 | 10,277 | 4.74% | 4,569 | 2.91 | City |
| Irondale | 5 | 8,520 | 8,107 | 0.85% | 2,700 | 3.16 | CDP |
| Jonesboro | 6 | 6,236 | 5,996 | 0.78% | 2,084 | 2.99 | City |
| Morrow | 7 | 6,211 | 6,670 | -1.46% | 1,779 | 3.49 | City |
| Conley | 8 | 5,808 | 6,645 | -0.48% | 3,006 | 1.93 | CDP |
| Bonanza | 9 | 3,764 | 3,877 | 1.13% | 3,592 | 1.05 | CDP |
| Lake City | 10 | 2,854 | 2,958 | -0.73% | 1,539 | 1.85 | City |
| Woolsey | 11 | 207 | 206 | 0% | 253 | 0.82 | Town |
Forest Park is the largest city in Clayton County, with a population of 19,091.
Woolsey is the smallest city in Clayton County.
There are 11 cities in Clayton County, Georgia.