4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jamestown | 1 | 2,114 | 2,021 | 0.91% | 679 | 3.11 | City |
| Grimsley | 2 | 702 | 975 | -4.23% | 64 | 10.89 | CDP |
| Clarkrange | 3 | 686 | 794 | 1.03% | 68 | 10.16 | CDP |
| Allardt | 4 | 612 | 556 | 1.83% | 162 | 3.77 | City |
Jamestown is the largest city in Fentress County, with a population of 2,114.
Allardt is the smallest city in Fentress County.
There are 4 cities in Fentress County, Tennessee.