6 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Keowee Key | Oconee County | 4,070 |
| Kingstree | Williamsburg County | 2,968 |
| Kershaw | Lancaster County | 2,147 |
| Kiawah Island | Charleston County | 1,997 |
| Kline | Allendale County | 140 |
| Ketchuptown | Dillon County | 52 |