2 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mountain City | 1 | 2,492 | 2,419 | 0.61% | 739 | 3.37 | Town |
| Butler | 2 | 314 | 391 | 7.17% | 412 | 0.76 | CDP |
Mountain City is the largest city in Johnson County, with a population of 2,492.
Butler is the smallest city in Johnson County.
There are 2 cities in Johnson County, Tennessee.