34 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hallock | 1 | 851 | 905 | -1.28% | 399 | 2 | City |
| Karlstad | 2 | 668 | 708 | -1.18% | 444 | 2 | City |
| Lancaster | 3 | 342 | 362 | -1.16% | 147 | 2 | City |
| Humboldt | 4 | 282 | 278 | 0.36% | 9 | 33 | Township |
| Lake Bronson | 5 | 167 | 179 | -1.18% | 316 | 1 | City |
| Kennedy | 6 | 165 | 177 | -1.2% | 369 | 0 | City |
| Thompson | 7 | 134 | 138 | 0% | 4 | 36 | Township |
| Poppleton | 8 | 124 | 130 | -0.8% | 4 | 35 | Township |
| Jupiter | 9 | 105 | 108 | 0% | 3 | 36 | Township |
| Richardville | 10 | 103 | 106 | 0% | 2 | 45 | Township |
| Arveson | 11 | 94 | 99 | -1.05% | 3 | 34 | Township |
| Hazelton | 12 | 93 | 98 | -1.06% | 3 | 36 | Township |
| Norway | 13 | 87 | 92 | -1.14% | 2 | 35 | Township |
| Hallock | 14 | 81 | 84 | 0% | 2 | 34 | Township |
| Teien | 15 | 64 | 69 | -1.54% | 2 | 29 | Township |
| Granville | 16 | 61 | 66 | -1.61% | 2 | 34 | Township |
| Halma | 17 | 54 | 58 | -1.82% | 58 | 1 | City |
| St. Vincent | 18 | 50 | 54 | -1.96% | 49 | 1 | City |
| Spring Brook | 19 | 49 | 51 | 0% | 1 | 36 | Township |
| St. Vincent | 20 | 46 | 48 | 0% | 1 | 54 | Township |
| Skane | 21 | 45 | 47 | 0% | 1 | 35 | Township |
| Pelan | 22 | 40 | 44 | -2.44% | 1 | 36 | Township |
| Humboldt | 23 | 37 | 41 | -2.63% | 333 | 0 | City |
| Percy | 24 | 36 | 37 | 0% | 1 | 35 | Township |
| Davis | 25 | 35 | 36 | 0% | 1 | 36 | Township |
| Svea | 26 | 34 | 38 | -2.86% | 1 | 36 | Township |
| Tegner | 27 | 34 | 35 | 0% | 1 | 36 | Township |
| Caribou | 28 | 33 | 34 | 0% | 1 | 44 | Township |
| Clow | 29 | 32 | 33 | 0% | 1 | 45 | Township |
| Hampden | 30 | 32 | 33 | 0% | 1 | 36 | Township |
| Hill | 31 | 23 | 24 | 0% | 1 | 32 | Township |
| South Red River | 32 | 20 | 21 | 0% | 1 | 18 | Township |
| Donaldson | 33 | 19 | 21 | 0% | 84 | 0 | City |
| Cannon | 34 | 11 | 14 | -8.33% | 0.00 | 36 | Township |
Hallock is the largest city in Kittson County, with a population of 851.
Cannon is the smallest city in Kittson County, with a population of 11.
There are 34 cities in Kittson County, Minnesota.