5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Modoc | 1 | 698 | 366 | 4.81% | 175 | 3.98 | CDP |
| Mount Carmel | 2 | 420 | 271 | 3.45% | 46 | 9.19 | CDP |
| Parksville | 3 | 131 | 120 | 1.55% | 180 | 0.73 | Town |
| Plum Branch | 4 | 84 | 79 | 1.21% | 114 | 0.74 | Town |
| Clarks Hill | 5 | 2 | 195 | -92.86% | 1 | 3.20 | CDP |
Modoc is the largest city in McCormick County, with a population of 698.
Clarks Hill is the smallest city in McCormick County.
There are 5 cities in McCormick County, South Carolina.