8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dyersburg | 1 | 15,864 | 16,118 | -0.32% | 916 | 17 | City |
| Newbern | 2 | 3,226 | 3,330 | -0.65% | 712 | 5 | Town |
| Fowlkes | 3 | 1,121 | 1,123 | 7.17% | 536 | 2 | CDP |
| Finley | 4 | 744 | 697 | 7.2% | 571 | 1 | CDP |
| Lenox | 5 | 644 | 513 | 7.15% | 256 | 3 | CDP |
| Trimble | 6 | 529 | 544 | -0.56% | 819 | 1 | Town |
| Bogota | 7 | 93 | 80 | 8.14% | 38 | 2 | CDP |
| Miston | 8 | 76 | 30 | 7.04% | 55 | 1 | CDP |
Dyersburg is the largest city in Dyer County, with a population of 15,864.
Miston is the smallest city in Dyer County, with a population of 76.
There are 8 cities in Dyer County, Tennessee.