There are 10 cities in Sioux County, North Dakota.
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 | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Lemmon | 1 | South Dakota | 1,127 | 1,161 | -0.7% | 1,026 | 1.10 |
| Cannon Ball | 2 | North Dakota | 849 | 943 | -2.64% | 10 | 88.27 |
| McLaughlin | 3 | South Dakota | 546 | 564 | -0.73% | 1,351 | 0.40 |
| Kenel | 4 | South Dakota | 206 | 146 | 7.85% | 210 | 0.98 |
| Fort Yates | 5 | North Dakota | 161 | 177 | -2.42% | 2,683 | 0.06 |
| Selfridge | 6 | North Dakota | 115 | 127 | -2.54% | 390 | 0.29 |
| McIntosh | 7 | South Dakota | 109 | 113 | -0.91% | 149 | 0.73 |
| Porcupine | 8 | North Dakota | 102 | 162 | -6.42% | 505 | 0.20 |
| Solen | 9 | North Dakota | 64 | 72 | -3.03% | 192 | 0.33 |
| Morristown | 10 | South Dakota | 44 | 46 | 0% | 125 | 0.35 |
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.
Lemmon is the largest city in Sioux County.
Morristown is the smallest city in Sioux County.
There are 10 cities in Sioux County, North Dakota.