3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dayton | 1 | 7,560 | 7,064 | 1.33% | 889 | 8.50 | City |
| Spring City | 2 | 1,952 | 1,942 | 0.1% | 706 | 2.76 | Town |
| Graysville | 3 | 1,510 | 1,474 | 0.47% | 1,282 | 1.18 | Town |
Dayton is the largest city in Rhea County, with a population of 7,560.
Graysville is the smallest city in Rhea County.
There are 3 cities in Rhea County, Tennessee.