Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Myrtle Beach | 1 | 40,938 | 35,973 | 3.13% | 1,749 | 23.4 | City |
| Carolina Forest | 2 | 28,960 | 23,426 | 7.69% | 1,722 | 16.8 | CDP |
| Conway | 3 | 28,938 | 25,125 | 3.4% | 1,172 | 24.7 | City |
| Socastee | 4 | 25,216 | 25,846 | 1.51% | 1,887 | 13.4 | CDP |
| North Myrtle Beach | 5 | 20,767 | 18,910 | 2.28% | 944 | 22.0 | City |
| Red Hill | 6 | 15,979 | 16,290 | 1.25% | 1,454 | 11.0 | CDP |
| Garden City | 7 | 11,164 | 11,193 | 1.26% | 2,089 | 5.3 | CDP |
| Murrells Inlet | 8 | 10,755 | 9,292 | 2.18% | 1,470 | 7.3 | CDP |
| Little River | 9 | 9,958 | 9,692 | 0.73% | 950 | 10.5 | CDP |
| Forestbrook | 10 | 7,881 | 7,613 | 3.05% | 2,147 | 3.7 | CDP |
| Surfside Beach | 11 | 4,375 | 4,158 | 1.25% | 2,246 | 1.9 | Town |
| Loris | 12 | 2,843 | 2,465 | 3.42% | 624 | 4.6 | City |
| Homewood | 13 | 1,505 | 1,642 | 7.65% | 741 | 2.0 | CDP |
| Aynor | 14 | 1,074 | 982 | 2.19% | 596 | 1.8 | Town |
| Bucksport | 15 | 722 | 607 | -1.5% | 172 | 4.2 | CDP |
| Finklea | 16 | 606 | 426 | 7.83% | 225 | 2.7 | CDP |
| Briarcliffe Acres | 17 | 565 | 484 | 3.67% | 888 | 0.6 | Town |
| Atlantic Beach | 18 | 406 | 200 | 14.37% | 2,506 | 0.2 | Town |
| Nichols | 19 | 220 | 230 | -1.34% | 165 | 1.3 | Town |
| Green Sea | 20 | 74 | 70 | 8.82% | 42 | 1.8 | CDP |
| Live Oak | 21 | 10 | 66 | 0% | 12 | 0.8 | CDP |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Myrtle Beach is the largest city in Horry County.
Live Oak is the smallest city in Horry County.
There are 21 cities in Horry County, South Carolina.