9 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hallock | 1 | 832 | 894 | -1.19% | 390 | 2 | City |
| Karlstad | 2 | 654 | 705 | -1.21% | 435 | 2 | City |
| Lancaster | 3 | 332 | 356 | -1.19% | 142 | 2 | City |
| Lake Bronson | 4 | 165 | 179 | -1.2% | 312 | 1 | City |
| Kennedy | 5 | 161 | 176 | -1.23% | 360 | 0 | City |
| Halma | 6 | 54 | 59 | -1.82% | 58 | 1 | City |
| St. Vincent | 7 | 48 | 53 | -2.04% | 47 | 1 | City |
| Humboldt | 8 | 38 | 41 | 0% | 342 | 0 | City |
| Donaldson | 9 | 16 | 18 | 0% | 70 | 0 | City |
Hallock is the largest city in Kittson County, with a population of 832.
Donaldson is the smallest city in Kittson County, with a population of 16.
There are 9 cities in Kittson County, Minnesota.