17 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kennett | 1 | 9,869 | 10,488 | -1.24% | 1,409 | 7 | City |
| Cotton Hill township | 2 | 4,590 | 4,982 | -1.65% | 129 | 35.59 | Township |
| Malden | 3 | 3,407 | 3,699 | -1.67% | 409 | 8.32 | City |
| Campbell | 4 | 1,475 | 1,599 | -1.67% | 1,051 | 1.40 | City |
| Senath | 5 | 1,472 | 1,589 | -1.54% | 765 | 1.92 | City |
| Freeborn township | 6 | 1,340 | 1,452 | -1.54% | 46 | 28.87 | Township |
| Holcomb township | 7 | 1,228 | 1,332 | -1.76% | 31 | 40.05 | Township |
| Clay township | 8 | 1,127 | 1,218 | -1.57% | 10 | 116.41 | Township |
| Clarkton | 9 | 923 | 1,005 | -1.7% | 818 | 1.13 | City |
| Holcomb | 10 | 577 | 626 | -1.7% | 990 | 0.58 | City |
| Cardwell | 11 | 513 | 562 | -1.91% | 814 | 0.63 | City |
| Hornersville | 12 | 489 | 534 | -1.81% | 626 | 0.78 | City |
| Arbyrd | 13 | 382 | 407 | -1.29% | 380 | 1 | City |
| Denton | 14 | 124 | 93 | 6.9% | 328 | 0.38 | CDP |
| Frisbee | 15 | 72 | 84 | 5.88% | 90 | 0.80 | CDP |
| White Oak | 16 | 64 | 150 | 6.67% | 508 | 0.13 | CDP |
| Rives | 17 | 41 | 41 | 0% | 112 | 0.36 | Town |
Kennett is the largest city in Dunklin County, with a population of 9,869.
Rives is the smallest city in Dunklin County.
There are 17 cities in Dunklin County, Missouri.