2 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Maynardville | 1 | 2,629 | 2,471 | 1.19% | 487 | 5 | City |
| Luttrell | 2 | 1,103 | 1,018 | 1.57% | 281 | 4 | Town |
Maynardville is the largest city in Union County, with a population of 2,629.
Luttrell is the smallest city in Union County, with a population of 1,103.
There are 2 cities in Union County, Tennessee.