3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dayton | 1 | 7,891 | 7,416 | 1.22% | 928 | 9 | City |
| Spring City | 2 | 2,009 | 1,944 | 0.65% | 727 | 3 | Town |
| Graysville | 3 | 1,516 | 1,473 | 0.53% | 1,287 | 1 | Town |
Dayton is the largest city in Rhea County, with a population of 7,891.
Graysville is the smallest city in Rhea County, with a population of 1,516.
There are 3 cities in Rhea County, Tennessee.