40 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Moorhead | 1 | 45,642 | 44,542 | 0.48% | 2,048 | 22.28 | City |
| Dilworth | 2 | 4,881 | 4,608 | 1.14% | 1,517 | 3.22 | City |
| Barnesville | 3 | 2,768 | 2,762 | 0.04% | 1,306 | 2.12 | City |
| Hawley | 4 | 2,313 | 2,237 | 0.65% | 940 | 2.46 | City |
| Glyndon | 5 | 1,392 | 1,306 | 1.24% | 880 | 1.58 | City |
| Eglon | 6 | 704 | 708 | -0.14% | 21 | 33.97 | Township |
| Sabin | 7 | 598 | 617 | -0.66% | 1,317 | 0.45 | City |
| Parke | 8 | 531 | 530 | 0.19% | 16 | 34.07 | Township |
| Spring Prairie | 9 | 513 | 507 | 0.39% | 14 | 35.58 | Township |
| Oakport | 10 | 503 | 504 | 0% | 19 | 26.51 | Township |
| Hawley | 11 | 483 | 475 | 0.63% | 16 | 30.74 | Township |
| Ulen | 12 | 473 | 478 | -0.21% | 443 | 1.07 | City |
| Riverton | 13 | 442 | 434 | 0.68% | 12 | 35.79 | Township |
| Elmwood | 14 | 415 | 411 | 0.24% | 12 | 35.54 | Township |
| Glyndon | 15 | 320 | 317 | 0.31% | 10 | 33.63 | Township |
| Highland Grove | 16 | 270 | 271 | -0.37% | 8 | 34.35 | Township |
| Tansem | 17 | 270 | 268 | 0.37% | 8 | 35.53 | Township |
| Moland | 18 | 260 | 258 | 0.39% | 7 | 35.16 | Township |
| Kragnes | 19 | 257 | 255 | 0.39% | 7 | 38.19 | Township |
| Kurtz | 20 | 247 | 252 | -0.8% | 8 | 32.39 | Township |
| Hitterdal | 21 | 201 | 200 | 0% | 233 | 0.86 | City |
| Goose Prairie | 22 | 200 | 198 | 0.5% | 6 | 34.97 | Township |
| Alliance | 23 | 198 | 201 | -0.5% | 5 | 36.33 | Township |
| Moorhead | 24 | 191 | 186 | 1.06% | 16 | 11.82 | Township |
| Barnesville | 25 | 180 | 178 | 0.56% | 5 | 35.44 | Township |
| Skree | 26 | 178 | 177 | 0% | 5 | 33.62 | Township |
| Ulen | 27 | 174 | 173 | 0% | 5 | 35.18 | Township |
| Felton | 28 | 164 | 174 | -1.2% | 162 | 1.01 | City |
| Morken | 29 | 159 | 154 | 1.27% | 4 | 35.96 | Township |
| Keene | 30 | 151 | 154 | -0.66% | 5 | 32.41 | Township |
| Georgetown | 31 | 132 | 135 | -0.75% | 4 | 36.81 | Township |
| Hagen | 32 | 130 | 127 | 0.78% | 4 | 32.48 | Township |
| Comstock | 33 | 116 | 121 | -0.85% | 3 | 45.25 | Township |
| Holy Cross | 34 | 109 | 112 | -0.91% | 3 | 33.25 | Township |
| Comstock | 35 | 99 | 99 | 0% | 429 | 0.23 | City |
| Viding | 36 | 95 | 95 | 0% | 3 | 35.68 | Township |
| Flowing | 37 | 89 | 91 | -1.11% | 2 | 35.93 | Township |
| Georgetown | 38 | 85 | 89 | -1.16% | 83 | 1.02 | City |
| Felton | 39 | 79 | 81 | -1.25% | 2 | 35.24 | Township |
| Baker | 40 | 59 | 41 | 7.27% | 58 | 1.01 | CDP |
Moorhead is the largest city in Clay County, with a population of 45,642.
Baker is the smallest city in Clay County, with a population of 59.
There are 40 cities in Clay County, Minnesota.