| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Shelbyville | 1 | 21,376 | 20,130 | 0.81% | 1,548 | 14 | City |
| Morristown | 2 | 1,178 | 1,210 | -0.42% | 307 | 4 | Town |
| Fairland | 3 | 534 | 543 | -0.37% | 468 | 1 | Town |
Shelbyville is the largest city in Shelby County, with a population of 21,376.
Fairland is the smallest city in Shelby County, with a population of 534.
There are 3 cities in Shelby County, Indiana.