2 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Maynardville | 1 | 2,655 | 2,470 | 1.41% | 492 | 5.39 | City |
| Luttrell | 2 | 1,094 | 1,019 | 1.39% | 278 | 3.93 | Town |
Maynardville is the largest city in Union County, with a population of 2,655.
Luttrell is the smallest city in Union County.
There are 2 cities in Union County, Tennessee.