| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Franklin | 1 | 10,848 | 10,213 | 0.83% | 718 | 15 | City |
Franklin is the largest city in Simpson County, with a population of 10,848.
Franklin is the smallest city in Simpson County, with a population of 10,848.
There is 1 city in Simpson County, Kentucky.