9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dillon | 1 | 6,172 | 6,507 | -1.07% | 1,156 | 5 | City |
| Latta | 2 | 1,225 | 1,292 | -1.05% | 1,118 | 1 | Town |
| Newtown | 3 | 961 | 1,293 | 7.13% | 1,834 | 1 | CDP |
| Hamer | 4 | 950 | 994 | 7.1% | 188 | 5 | CDP |
| Lake View | 5 | 750 | 787 | -0.92% | 440 | 2 | Town |
| Little Rock | 6 | 656 | 848 | 7.19% | 267 | 2 | CDP |
| Floydale | 7 | 174 | 278 | 7.41% | 86 | 2 | CDP |
| Zion | 8 | 128 | 92 | 7.56% | 361 | 0 | CDP |
| Ketchuptown | 9 | 6 | 35 | 0% | 2 | 3 | CDP |
Dillon is the largest city in Dillon County, with a population of 6,172.
Ketchuptown is the smallest city in Dillon County, with a population of 6.
There are 9 cities in Dillon County, South Carolina.