| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kennett | 1 | 10,036 | 10,483 | -0.81% | 1,433 | 7 | City |
| Malden | 2 | 3,451 | 3,695 | -1.2% | 415 | 8 | City |
| Senath | 3 | 1,486 | 1,588 | -1.2% | 772 | 2 | City |
| Campbell | 4 | 1,469 | 1,583 | -1.34% | 1,046 | 1 | City |
| Clarkton | 5 | 931 | 1,004 | -1.38% | 825 | 1 | City |
| Holcomb | 6 | 581 | 625 | -1.36% | 997 | 1 | City |
| Cardwell | 7 | 522 | 562 | -1.32% | 829 | 1 | City |
| Hornersville | 8 | 493 | 533 | -1.4% | 631 | 1 | City |
| Arbyrd | 9 | 383 | 405 | -1.03% | 381 | 1 | City |
| Rives | 10 | 40 | 41 | 0% | 110 | 0 | Town |
Kennett is the largest city in Dunklin County, with a population of 10,036.
Rives is the smallest city in Dunklin County, with a population of 40.
There are 10 cities in Dunklin County, Missouri.