2 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mountain City | 1 | 2,503 | 2,417 | 0.68% | 743 | 3 | Town |
| Butler | 2 | 314 | 391 | 7.17% | 412 | 1 | CDP |
Mountain City is the largest city in Johnson County, with a population of 2,503.
Butler is the smallest city in Johnson County, with a population of 314.
There are 2 cities in Johnson County, Tennessee.