There are 11 cities in Dewey County, South 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) |
|---|---|---|---|---|---|---|---|
| Mobridge | 1 | South Dakota | 3,217 | 3,245 | -0.22% | 1,641 | 1.96 |
| North Eagle Butte | 2 | South Dakota | 1,536 | 1,838 | -4.06% | 174 | 8.82 |
| Eagle Butte | 3 | South Dakota | 1,220 | 1,250 | -0.65% | 896 | 1.36 |
| Gettysburg | 4 | South Dakota | 1,061 | 1,103 | -1.03% | 552 | 1.92 |
| Timber Lake | 5 | South Dakota | 517 | 512 | 0.19% | 846 | 0.61 |
| La Plant | 6 | South Dakota | 295 | 305 | -0.67% | 31 | 9.45 |
| Isabel | 7 | South Dakota | 145 | 145 | 0% | 172 | 0.84 |
| Swift Bird | 8 | South Dakota | 139 | 220 | -12.58% | 283 | 0.49 |
| Whitehorse | 9 | South Dakota | 49 | 245 | -50% | 18 | 2.74 |
| Lantry | 10 | South Dakota | 41 | 48 | 2.5% | 99 | 0.41 |
| Green Grass | 11 | South Dakota | 0 | 22 | 0% | 0 | 8.13 |
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.
Mobridge is the largest city in Dewey County.
Green Grass is the smallest city in Dewey County.
There are 11 cities in Dewey County, South Dakota.