2 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Shelbyville | 1 | 18,222 | 17,350 | 0.96% | 1,972 | 9 | City |
| Simpsonville | 2 | 3,150 | 2,993 | 0.99% | 1,339 | 2 | City |
Shelbyville is the largest city in Shelby County, with a population of 18,222.
Simpsonville is the smallest city in Shelby County, with a population of 3,150.
There are 2 cities in Shelby County, Kentucky.