Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fargo | 1 | 135,588 | 125,986 | 1.8% | 2,667 | 50.8 | City |
| West Fargo | 2 | 40,901 | 38,895 | 1.24% | 2,529 | 16.2 | City |
| Horace | 3 | 6,441 | 3,249 | 14.14% | 509 | 12.7 | City |
| Casselton | 4 | 2,470 | 2,478 | -0.08% | 1,142 | 2.2 | City |
| Mapleton | 5 | 1,470 | 1,330 | 2.44% | 376 | 3.9 | City |
| Kindred | 6 | 1,055 | 930 | 3.03% | 728 | 1.4 | City |
| Reile's Acres | 7 | 883 | 715 | 4.99% | 778 | 1.1 | City |
| Harwood | 8 | 837 | 797 | 1.21% | 642 | 1.3 | City |
| Argusville | 9 | 470 | 484 | -0.84% | 117 | 4.0 | City |
| Oxbow | 10 | 369 | 376 | -0.54% | 241 | 1.5 | City |
| Hunter | 11 | 325 | 333 | -0.61% | 218 | 1.5 | City |
| Arthur | 12 | 323 | 326 | -0.31% | 211 | 1.5 | City |
| Tower City | 13 | 277 | 267 | 0.73% | 135 | 2.0 | City |
| Davenport | 14 | 254 | 254 | 0% | 934 | 0.3 | City |
| Leonard | 15 | 243 | 247 | -0.41% | 324 | 0.8 | City |
| Grandin | 16 | 198 | 186 | 1.54% | 1,094 | 0.2 | City |
| Frontier | 17 | 192 | 196 | -0.52% | 1,021 | 0.2 | City |
| Page | 18 | 188 | 192 | -0.53% | 187 | 1.0 | City |
| Buffalo | 19 | 186 | 193 | -1.06% | 387 | 0.5 | City |
| Brooktree Park | 20 | 182 | 218 | 7.69% | 1,034 | 0.2 | CDP |
| Gardner | 21 | 126 | 129 | -0.79% | 254 | 0.5 | City |
| Amenia | 22 | 83 | 85 | -1.19% | 56 | 1.5 | City |
| Wheatland | 23 | 68 | 31 | 7.94% | 17 | 4.0 | CDP |
| Erie | 24 | 55 | 29 | 7.84% | 27 | 2.0 | CDP |
| North River | 25 | 55 | 57 | -1.79% | 902 | 0.1 | City |
| Prairie Rose | 26 | 54 | 56 | -1.82% | 1,317 | 0.0 | City |
| Briarwood | 27 | 52 | 54 | -1.89% | 364 | 0.1 | City |
| Embden | 28 | 37 | 26 | 5.71% | 52 | 0.7 | CDP |
| Ayr | 29 | 11 | 11 | 0% | 129 | 0.1 | City |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Fargo is the largest city in Cass County.
Ayr is the smallest city in Cass County.
There are 29 cities in Cass County, North Dakota.