21 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Myrtle Beach | 1 | 41,675 | 35,973 | 2.81% | 1,780 | 23 | City |
| Carolina Forest | 2 | 31,029 | 23,426 | 7.14% | 1,845 | 17 | CDP |
| Conway | 3 | 30,776 | 25,176 | 3.78% | 1,246 | 25 | City |
| Socastee | 4 | 25,592 | 25,846 | 1.49% | 1,915 | 13 | CDP |
| North Myrtle Beach | 5 | 21,266 | 18,924 | 2.25% | 967 | 22 | City |
| Red Hill | 6 | 16,176 | 16,290 | 1.23% | 1,472 | 11 | CDP |
| Garden City | 7 | 11,304 | 11,193 | 1.25% | 2,115 | 5 | CDP |
| Murrells Inlet | 8 | 10,984 | 9,292 | 2.13% | 1,502 | 7 | CDP |
| Little River | 9 | 10,029 | 9,692 | 0.71% | 957 | 10 | CDP |
| Forestbrook | 10 | 8,114 | 7,613 | 2.96% | 2,211 | 4 | CDP |
| Surfside Beach | 11 | 4,420 | 4,160 | 1.19% | 2,269 | 2 | Town |
| Loris | 12 | 2,915 | 2,465 | 3.19% | 640 | 5 | City |
| Homewood | 13 | 1,612 | 1,642 | 7.11% | 794 | 2 | CDP |
| Aynor | 14 | 1,082 | 985 | 1.79% | 600 | 2 | Town |
| Bucksport | 15 | 711 | 607 | -1.52% | 169 | 4 | CDP |
| Finklea | 16 | 649 | 426 | 7.1% | 241 | 3 | CDP |
| Briarcliffe Acres | 17 | 589 | 484 | 3.7% | 926 | 1 | Town |
| Atlantic Beach | 18 | 472 | 200 | 12.92% | 2,914 | 0 | Town |
| Nichols | 19 | 218 | 230 | -1.36% | 163 | 1 | Town |
| Green Sea | 20 | 79 | 70 | 6.76% | 45 | 2 | CDP |
| Live Oak | 21 | 11 | 66 | 10% | 13 | 1 | CDP |
Myrtle Beach is the largest city in Horry County, with a population of 41,675.
Live Oak is the smallest city in Horry County, with a population of 11.
There are 21 cities in Horry County, South Carolina.