| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Myrtle Beach | 1 | 42,111 | 35,972 | 2.87% | 1,799 | 23 | City |
| Conway | 2 | 31,769 | 25,210 | 3.73% | 1,135 | 28 | City |
| North Myrtle Beach | 3 | 21,826 | 18,940 | 2.25% | 966 | 23 | City |
| Surfside Beach | 4 | 4,447 | 4,162 | 1.25% | 2,283 | 2 | Town |
| Loris | 5 | 3,027 | 2,467 | 3.13% | 665 | 5 | City |
| Aynor | 6 | 1,088 | 982 | 1.87% | 604 | 2 | Town |
| Briarcliffe Acres | 7 | 606 | 482 | 3.59% | 953 | 1 | Town |
| Atlantic Beach | 8 | 526 | 201 | 11.44% | 3,247 | 0 | Town |
| Nichols | 9 | 220 | 230 | -0.9% | 165 | 1 | Town |
Myrtle Beach is the largest city in Horry County, with a population of 42,111.
Nichols is the smallest city in Horry County, with a population of 220.
There are 9 cities in Horry County, South Carolina.