8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dyersburg | 1 | 15,865 | 16,122 | -0.32% | 916 | 17.32 | City |
| Newbern | 2 | 3,234 | 3,334 | -0.61% | 713 | 4.53 | Town |
| Fowlkes | 3 | 1,121 | 1,123 | 7.17% | 536 | 2.09 | CDP |
| Finley | 4 | 744 | 697 | 7.2% | 571 | 1.30 | CDP |
| Lenox | 5 | 644 | 513 | 7.15% | 256 | 2.52 | CDP |
| Trimble | 6 | 529 | 544 | -0.56% | 819 | 0.65 | Town |
| Bogota | 7 | 93 | 80 | 8.14% | 38 | 2.42 | CDP |
| Miston | 8 | 76 | 30 | 7.04% | 55 | 1.39 | CDP |
Dyersburg is the largest city in Dyer County, with a population of 15,865.
Miston is the smallest city in Dyer County.
There are 8 cities in Dyer County, Tennessee.