| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mount Vernon | 1 | 2,456 | 2,452 | 0.04% | 873 | 3 | City |
| Brodhead | 2 | 1,114 | 1,118 | -0.18% | 638 | 2 | City |
| Livingston | 3 | 165 | 165 | 0% | 527 | 0 | City |
Mount Vernon is the largest city in Rockcastle County, with a population of 2,456.
Livingston is the smallest city in Rockcastle County, with a population of 165.
There are 3 cities in Rockcastle County, Kentucky.