67 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| East Grand Forks | 1 | 8,787 | 9,142 | -0.8% | 1,478 | 5.95 | City |
| Crookston | 2 | 7,140 | 7,460 | -0.89% | 1,396 | 5.12 | City |
| Fosston | 3 | 1,353 | 1,425 | -1.02% | 676 | 2 | City |
| Fertile | 4 | 774 | 798 | -0.64% | 373 | 2.08 | City |
| McIntosh | 5 | 571 | 603 | -1.04% | 572 | 1 | City |
| Knute township | 6 | 545 | 563 | -0.91% | 17 | 31.69 | Township |
| Woodside township | 7 | 495 | 510 | -0.8% | 16 | 30.58 | Township |
| Columbia township | 8 | 430 | 442 | -0.92% | 12 | 34.63 | Township |
| Crookston township | 9 | 424 | 439 | -1.17% | 11 | 37.37 | Township |
| Huntsville township | 10 | 421 | 439 | -1.41% | 12 | 35.05 | Township |
| Fisher | 11 | 394 | 419 | -1.25% | 925 | 0.43 | City |
| Erskine | 12 | 378 | 402 | -1.31% | 586 | 0.65 | City |
| Rosebud township | 13 | 300 | 310 | -0.99% | 9 | 32.96 | Township |
| Godfrey township | 14 | 285 | 293 | -0.7% | 8 | 34.46 | Township |
| Lowell township | 15 | 284 | 284 | 0% | 8 | 34.53 | Township |
| Gentilly township | 16 | 248 | 260 | -1.59% | 8 | 32.16 | Township |
| Grove Park-Tilden township | 17 | 248 | 255 | -0.8% | 4 | 69.19 | Township |
| Bygland township | 18 | 241 | 253 | -1.63% | 9 | 28.22 | Township |
| Brandsvold township | 19 | 240 | 249 | -1.23% | 7 | 34.26 | Township |
| Climax | 20 | 238 | 243 | -0.42% | 254 | 0.94 | City |
| King township | 21 | 214 | 225 | -1.38% | 6 | 34.96 | Township |
| Garden township | 22 | 212 | 221 | -1.4% | 6 | 33.73 | Township |
| Queen township | 23 | 212 | 219 | -0.93% | 6 | 33.09 | Township |
| Sletten township | 24 | 190 | 197 | -1.04% | 5 | 36.02 | Township |
| Winger township | 25 | 187 | 194 | -1.06% | 5 | 35.15 | Township |
| Eden township | 26 | 186 | 190 | -0.53% | 5 | 35.06 | Township |
| Hill River township | 27 | 186 | 193 | -1.06% | 5 | 34.98 | Township |
| Grand Forks township | 28 | 185 | 192 | -1.07% | 13 | 13.78 | Township |
| Fisher township | 29 | 179 | 186 | -1.1% | 5 | 35.64 | Township |
| Winger | 30 | 173 | 175 | 0% | 534 | 0.32 | City |
| Roome township | 31 | 160 | 166 | -1.23% | 4 | 36.14 | Township |
| Sullivan township | 32 | 159 | 165 | -1.24% | 4 | 35.65 | Township |
| Esther township | 33 | 143 | 149 | -1.38% | 7 | 19.23 | Township |
| Northland township | 34 | 143 | 149 | -1.38% | 4 | 36.17 | Township |
| Lessor township | 35 | 137 | 143 | -1.44% | 4 | 35.71 | Township |
| Rhinehart township | 36 | 130 | 135 | -1.52% | 47 | 2.74 | Township |
| Gully township | 37 | 128 | 134 | -1.54% | 4 | 34.63 | Township |
| Euclid township | 38 | 127 | 133 | -1.55% | 4 | 35.56 | Township |
| Tabor township | 39 | 110 | 115 | -1.79% | 3 | 36.14 | Township |
| Liberty township | 40 | 107 | 113 | -1.83% | 3 | 36.09 | Township |
| Nesbit township | 41 | 104 | 110 | -1.89% | 3 | 35.94 | Township |
| Mentor | 42 | 98 | 105 | -1.01% | 51 | 1.91 | City |
| Chester township | 43 | 95 | 98 | -1.04% | 3 | 35.94 | Township |
| Fanny township | 44 | 92 | 95 | -1.08% | 3 | 35.94 | Township |
| Vineland township | 45 | 91 | 90 | 1.11% | 2 | 46.04 | Township |
| Kertsonville township | 46 | 88 | 87 | 1.15% | 2 | 36.43 | Township |
| Higdem township | 47 | 87 | 83 | 2.35% | 4 | 23.22 | Township |
| Beltrami | 48 | 82 | 87 | -1.2% | 41 | 2 | City |
| Angus township | 49 | 79 | 84 | -1.25% | 2 | 36.07 | Township |
| Nielsville | 50 | 75 | 80 | -1.32% | 260 | 0.29 | City |
| Reis township | 51 | 75 | 80 | -1.32% | 2 | 34.05 | Township |
| Tynsid township | 52 | 68 | 73 | -1.45% | 5 | 14.28 | Township |
| Belgium township | 53 | 67 | 65 | 1.52% | 2 | 36.36 | Township |
| Keystone township | 54 | 62 | 66 | -1.59% | 2 | 35.67 | Township |
| Onstad township | 55 | 62 | 66 | -1.59% | 2 | 35.67 | Township |
| Parnell township | 56 | 61 | 59 | 1.67% | 2 | 36.16 | Township |
| Gully | 57 | 57 | 57 | 0% | 232 | 0.25 | City |
| Hubbard township | 58 | 56 | 59 | -1.75% | 1 | 41.33 | Township |
| Farley township | 59 | 50 | 54 | -1.96% | 2 | 27.07 | Township |
| Brandt township | 60 | 48 | 50 | -2.04% | 1 | 36.04 | Township |
| Johnson township | 61 | 48 | 46 | 2.13% | 1 | 35.70 | Township |
| Sandsville township | 62 | 48 | 46 | 2.13% | 2 | 27.06 | Township |
| Brislet township | 63 | 43 | 47 | -2.27% | 2 | 27.01 | Township |
| Hammond township | 64 | 41 | 42 | 0% | 1 | 36.29 | Township |
| Helgeland township | 65 | 39 | 40 | 0% | 1 | 27.06 | Township |
| Trail | 66 | 38 | 38 | 0% | 38 | 1 | City |
| Russia township | 67 | 26 | 27 | 0% | 1 | 36.06 | Township |
East Grand Forks is the largest city in Polk County, with a population of 8,787.
Russia township is the smallest city in Polk County.
There are 67 cities in Polk County, Minnesota.