| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mountain City | 1 | 2,506 | 2,400 | 0.64% | 744 | 3 | Town |
Mountain City is the largest city in Johnson County, with a population of 2,506.
Mountain City is the smallest city in Johnson County, with a population of 2,506.
There is 1 city in Johnson County, Tennessee.