9 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Myrtle Beach | 1 | 42,816 | 35,973 | 2.74% | 1,829 | 23 | City |
| Conway | 2 | 31,896 | 25,176 | 3.64% | 1,139 | 28 | City |
| North Myrtle Beach | 3 | 21,735 | 18,924 | 2.21% | 962 | 23 | City |
| Surfside Beach | 4 | 4,472 | 4,160 | 1.18% | 2,296 | 2 | Town |
| Loris | 5 | 3,005 | 2,465 | 3.09% | 660 | 5 | City |
| Aynor | 6 | 1,102 | 985 | 1.85% | 612 | 2 | Town |
| Briarcliffe Acres | 7 | 610 | 484 | 3.57% | 959 | 1 | Town |
| Atlantic Beach | 8 | 527 | 200 | 11.65% | 3,253 | 0 | Town |
| Nichols | 9 | 216 | 230 | -0.92% | 162 | 1 | Town |
Myrtle Beach is the largest city in Horry County, with a population of 42,816.
Nichols is the smallest city in Horry County, with a population of 216.
There are 9 cities in Horry County, South Carolina.