3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mount Vernon | 1 | 2,458 | 2,453 | 0.04% | 873 | 2.81 | City |
| Brodhead | 2 | 1,127 | 1,119 | 0.18% | 646 | 1.75 | City |
| Livingston | 3 | 165 | 165 | 0% | 527 | 0.31 | City |
Mount Vernon is the largest city in Rockcastle County, with a population of 2,458.
Livingston is the smallest city in Rockcastle County.
There are 3 cities in Rockcastle County, Kentucky.