| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bartlett | 1 | 56,246 | 57,672 | -0.3% | 1,723 | 33 | City |
| Oakland | 2 | 11,264 | 9,071 | 3.96% | 1,076 | 10 | Town |
| Somerville | 3 | 3,650 | 3,430 | 0.77% | 269 | 14 | Town |
| Piperton | 4 | 3,007 | 2,305 | 4.08% | 111 | 27 | City |
| Rossville | 5 | 1,246 | 1,059 | 2.55% | 195 | 6 | Town |
| Moscow | 6 | 555 | 566 | -0.54% | 435 | 1 | City |
| Gallaway | 7 | 518 | 521 | -0.38% | 89 | 6 | City |
| Williston | 8 | 334 | 351 | -1.18% | 202 | 2 | City |
| Braden | 9 | 250 | 260 | -0.79% | 68 | 4 | Town |
| La Grange | 10 | 120 | 125 | -0.83% | 60 | 2 | Town |
Bartlett is the largest city in Fayette County, with a population of 56,246.
La Grange is the smallest city in Fayette County, with a population of 120.
There are 10 cities in Fayette County, Tennessee.