Founded in 1810, Rockcastle County is one of 120 counties in the state of Kentucky. Historically, Rockcastle County was formed from Lincoln County, Madison County, Knox County and Pulaski County. The city of Mount Vernon is the county seat. With FIPS code of 203, Rockcastle County has a population of 16,115 and area of 318 square miles (824 km2).
List of all cities in Rockcastle County, KY alphabetically
| City/Town | Postal Code | Area Code |
| Brodhead, KY | 40409 | 606 |
| Climax, KY | 40456 | 606 |
| Conway, KY | 40456 | 606 |
| Disputanta, KY | 40456 | 606 |
| Johnetta, KY | 40460 | 606 |
| Livingston, KY | 40445 | 606 |
| Mount Vernon, KY | 40456 | 606 |
| Orlando, KY | 40460 | 606 |
| Renfro Valley, KY | 40473 | 606 |
| Wildie, KY | 40492 | 606 |