46 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Aitkin | 1 | 2,146 | 2,161 | -0.14% | 734 | 2.92 | City |
| Shamrock township | 2 | 1,251 | 1,215 | -0.08% | 51 | 24.54 | Township |
| Farm Island township | 3 | 1,024 | 994 | -0.1% | 36 | 28.40 | Township |
| Nordland township | 4 | 1,014 | 987 | -0.1% | 32 | 31.26 | Township |
| Aitkin township | 5 | 948 | 917 | 0% | 30 | 31.34 | Township |
| Hazelton township | 6 | 818 | 796 | -0.12% | 29 | 28.14 | Township |
| Hill City | 7 | 606 | 613 | -0.16% | 544 | 1.11 | City |
| Spencer township | 8 | 542 | 530 | -0.18% | 15 | 36.95 | Township |
| Lakeside township | 9 | 522 | 503 | 0.19% | 18 | 28.98 | Township |
| Hill Lake township | 10 | 456 | 442 | 0% | 14 | 33.45 | Township |
| Glen township | 11 | 444 | 433 | -0.22% | 13 | 33.82 | Township |
| McGregor | 12 | 378 | 382 | -0.26% | 177 | 2.14 | City |
| Malmo township | 13 | 366 | 355 | 0% | 11 | 32.97 | Township |
| Wagner township | 14 | 343 | 333 | 0% | 10 | 35.01 | Township |
| Jevne township | 15 | 342 | 331 | 0% | 10 | 34.20 | Township |
| Fleming township | 16 | 338 | 331 | -0.29% | 10 | 33.59 | Township |
| Spalding township | 17 | 336 | 320 | 0.6% | 9 | 36.82 | Township |
| Waukenabo township | 18 | 322 | 312 | 0% | 10 | 33.20 | Township |
| Ball Bluff township | 19 | 276 | 268 | 0% | 8 | 33.94 | Township |
| Wealthwood township | 20 | 260 | 255 | -0.38% | 11 | 23.17 | Township |
| Idun township | 21 | 233 | 225 | 0% | 6 | 36.64 | Township |
| Workman township | 22 | 221 | 215 | 0% | 7 | 32.91 | Township |
| Kimberly township | 23 | 192 | 186 | 0% | 5 | 35.92 | Township |
| Logan township | 24 | 189 | 183 | 0% | 5 | 34.98 | Township |
| Morrison township | 25 | 181 | 178 | -0.55% | 5 | 36.01 | Township |
| Macville township | 26 | 174 | 167 | 0% | 5 | 36.19 | Township |
| Palisade | 27 | 168 | 162 | 0.6% | 246 | 0.68 | City |
| Haugen township | 28 | 162 | 155 | 0.62% | 5 | 35.80 | Township |
| Turner township | 29 | 143 | 136 | 0.7% | 5 | 29.96 | Township |
| Rice River township | 30 | 130 | 123 | 0.78% | 4 | 36.08 | Township |
| Clark township | 31 | 122 | 119 | 0% | 4 | 31.81 | Township |
| Pliny township | 32 | 118 | 117 | -0.84% | 3 | 36.31 | Township |
| McGregor township | 33 | 102 | 101 | -0.97% | 3 | 32.87 | Township |
| Salo township | 34 | 91 | 88 | 0% | 3 | 35.48 | Township |
| Beaver township | 35 | 65 | 62 | 0% | 2 | 35.29 | Township |
| Millward township | 36 | 63 | 61 | 0% | 1 | 71.36 | Township |
| Seavey township | 37 | 62 | 60 | 0% | 2 | 36.26 | Township |
| Tamarack | 38 | 58 | 55 | 1.75% | 17 | 3.50 | City |
| Libby township | 39 | 48 | 44 | 2.13% | 1 | 34.74 | Township |
| Cornish township | 40 | 44 | 43 | 0% | 1 | 34.36 | Township |
| McGrath | 41 | 43 | 43 | 0% | 116 | 0.37 | City |
| Lee township | 42 | 42 | 38 | 2.44% | 1 | 34.44 | Township |
| Verdon township | 43 | 42 | 38 | 2.44% | 1 | 35.75 | Township |
| Denham | 44 | 39 | 36 | 2.63% | 29 | 1.33 | City |
| White Pine township | 45 | 36 | 37 | -2.7% | 1 | 36.67 | Township |
| Balsam township | 46 | 30 | 29 | 0% | 1 | 35.99 | Township |
Aitkin is the largest city in Aitkin County, with a population of 2,146.
Balsam township is the smallest city in Aitkin County.
There are 46 cities in Aitkin County, Minnesota.