39 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Moorhead | 1 | 46,317 | 44,544 | 0.64% | 2,079 | 22 | City |
| Dilworth | 2 | 4,913 | 4,606 | 1.05% | 1,420 | 3 | City |
| Barnesville | 3 | 2,766 | 2,762 | 0.04% | 1,382 | 2 | City |
| Hawley | 4 | 2,293 | 2,236 | 0.44% | 875 | 3 | City |
| Glyndon | 5 | 1,398 | 1,310 | 1.08% | 884 | 2 | City |
| Eglon | 6 | 709 | 709 | 0% | 21 | 34 | Township |
| Sabin | 7 | 593 | 617 | -0.67% | 1,306 | 0 | City |
| Parke | 8 | 530 | 529 | 0% | 16 | 34 | Township |
| Spring Prairie | 9 | 514 | 506 | 0.39% | 14 | 36 | Township |
| Oakport | 10 | 502 | 504 | -0.2% | 19 | 27 | Township |
| Hawley | 11 | 482 | 479 | 0% | 16 | 31 | Township |
| Ulen | 12 | 469 | 478 | -0.21% | 440 | 1 | City |
| Riverton | 13 | 438 | 435 | 0% | 12 | 36 | Township |
| Elmwood | 14 | 414 | 411 | 0% | 12 | 36 | Township |
| Glyndon | 15 | 318 | 313 | 0.32% | 9 | 34 | Township |
| Highland Grove | 16 | 273 | 269 | 0.37% | 8 | 34 | Township |
| Tansem | 17 | 271 | 269 | 0% | 8 | 36 | Township |
| Kragnes | 18 | 258 | 256 | 0.39% | 7 | 38 | Township |
| Kurtz | 19 | 257 | 254 | 0.39% | 8 | 32 | Township |
| Moland | 20 | 254 | 259 | -0.78% | 7 | 35 | Township |
| Alliance | 21 | 204 | 201 | 0.49% | 6 | 36 | Township |
| Hitterdal | 22 | 203 | 200 | 0.5% | 236 | 1 | City |
| Goose Prairie | 23 | 198 | 200 | -0.5% | 6 | 35 | Township |
| Moorhead | 24 | 184 | 186 | -0.54% | 16 | 12 | Township |
| Skree | 25 | 180 | 176 | 0.56% | 5 | 34 | Township |
| Barnesville | 26 | 178 | 180 | -0.56% | 5 | 35 | Township |
| Ulen | 27 | 171 | 173 | -1.16% | 5 | 35 | Township |
| Felton | 28 | 165 | 176 | -1.2% | 163 | 1 | City |
| Morken | 29 | 154 | 152 | 0.65% | 4 | 36 | Township |
| Keene | 30 | 151 | 152 | -0.66% | 5 | 32 | Township |
| Georgetown | 31 | 141 | 136 | 1.44% | 4 | 37 | Township |
| Hagen | 32 | 134 | 129 | 1.52% | 4 | 32 | Township |
| Comstock | 33 | 115 | 121 | -0.86% | 3 | 45 | Township |
| Holy Cross | 34 | 109 | 112 | -0.91% | 3 | 33 | Township |
| Comstock | 35 | 98 | 100 | 0% | 424 | 0 | City |
| Viding | 36 | 95 | 95 | 0% | 3 | 36 | Township |
| Flowing | 37 | 88 | 90 | -1.12% | 2 | 36 | Township |
| Georgetown | 38 | 86 | 89 | 0% | 84 | 1 | City |
| Felton | 39 | 82 | 82 | 0% | 2 | 35 | Township |
Moorhead is the largest city in Clay County, with a population of 46,317.
Felton is the smallest city in Clay County, with a population of 82.
There are 39 cities in Clay County, Minnesota.