5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Modoc | 1 | 698 | 366 | 4.8% | 175 | 4 | CDP |
| Mount Carmel | 2 | 420 | 271 | 3.45% | 46 | 9 | CDP |
| Parksville | 3 | 132 | 119 | 1.54% | 181 | 1 | Town |
| Plum Branch | 4 | 82 | 79 | 0% | 111 | 1 | Town |
| Clarks Hill | 5 | 2 | 195 | -92.86% | 1 | 3 | CDP |
Modoc is the largest city in McCormick County, with a population of 698.
Clarks Hill is the smallest city in McCormick County, with a population of 2.
There are 5 cities in McCormick County, South Carolina.