Clay County Census 2010
| City or Township | Population 2010 | Population 2000 | Change in Population | Change as % |
|---|---|---|---|---|
| City of Barnesville | 2,563 | 2,173 | 390 | 17.9 |
| City of Comstock | 93 | 123 | -30 | -24.4 |
| City of Dilworth | 4,024 | 3,001 | 1,023 | 34.1 |
| City of Felton | 177 | 216 | -39 | -18.1 |
| City of Georgetown | 129 | 125 | 4 | 3.2 |
| City of Glyndon | 1,394 | 1,049 | 345 | 32.9 |
| City of Hawley | 2,067 | 1,882 | 185 | 9.8 |
| City of Hitterdal | 201 | 201 | 0 | 0.0 |
| City of Moorhead | 38,065 | 32,177 | 5,888 | 18.3 |
| City of Sabin | 522 | 421 | 101 | 24.0 |
| City of Ulen | 547 | 532 | 15 | 2.8 |
| Township of Alliance | 235 | 246 | -11 | -4.5 |
| Township of Barnesville | 147 | 149 | -2 | -1.3 |
| Township of Cromwell | 345 | 323 | 22 | 6.8 |
| Township of Eglon | 508 | 440 | 68 | 15.5 |
| Township of Elkton | 308 | 283 | 25 | 8.8 |
| Township of Elmwood | 415 | 371 | 44 | 11.9 |
| Township of Felton | 86 | 108 | -22 | -20.4 |
| Township of Flowing | 77 | 97 | -20 | -20.6 |
| Township of Georgetown | 156 | 188 | -32 | -17.0 |
| Township of Glyndon | 278 | 281 | -3 | -1.1 |
| Township of Goose Prairie | 175 | 199 | -24 | -12.1 |
| Township of Hagen | 154 | 153 | 1 | .7 |
| Township of Hawley | 474 | 459 | 15 | 3.3 |
| Township of Highland Grove | 288 | 304 | -16 | -5.3 |
| Township of Holy Cross | 140 | 129 | 11 | 8.5 |
| Township of Humboldt | 275 | 239 | 36 | 15.1 |
| Township of Keene | 155 | 128 | 27 | 21.1 |
| Township of Kragnes | 293 | 319 | -26 | -8.2 |
| Township of Kurtz | 293 | 288 | 5 | 1.7 |
| Township of Moland | 299 | 340 | -41 | -12.1 |
| Township of Moorhead | 169 | 442 | -273 | -61.8 |
| Township of Morken | 156 | 203 | -47 | -23.2 |
| Township of Oakport | 1,797 | 1,689 | 108 | 6.4 |
| Township of Parke | 485 | 450 | 35 | 7.8 |
| Township of Riverton | 446 | 462 | -16 | -3.5 |
| Township of Skree | 159 | 166 | -7 | -4.2 |
| Township of Spring Prairie | 368 | 364 | 4 | 1.1 |
| Township of Tansem | 259 | 222 | 37 | 16.7 |
| Township of Ulen | 174 | 163 | 11 | 6.7 |
| Township of Viding | 103 | 124 | -21 | -16.9 |
| Total | 58,999 | 51,229 | 7,770 | 15.2 |