| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Parksville | 1 | 133 | 119 | 1.53% | 183 | 1 | Town |
| Plum Branch | 2 | 80 | 77 | 0% | 108 | 1 | Town |
Parksville is the largest city in McCormick County, with a population of 133.
Plum Branch is the smallest city in McCormick County, with a population of 80.
There are 2 cities in McCormick County, South Carolina.