10 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Little Eagle | 1 | 349 | 309 | 0.58% | 250 | 1 | CDP |
| Wakpala | 2 | 296 | 292 | 7.25% | 676 | 0 | CDP |
| Wakpala | 3 | 268 | 279 | -0.37% | 13 | 20 | Township |
| Bullhead | 4 | 226 | 296 | -3.42% | 75 | 3 | CDP |
| Ridgeland | 5 | 54 | 56 | 0% | 1 | 82 | Township |
| Morristown | 6 | 43 | 46 | -2.27% | 123 | 0 | Town |
| Pleasant Ridge | 7 | 29 | 30 | 0% | 1 | 36 | Township |
| Rolling Green | 8 | 29 | 30 | 0% | 1 | 51 | Township |
| Watauga | 9 | 25 | 26 | 0% | 2 | 16 | Township |
| Prairie View | 10 | 20 | 21 | 0% | 1 | 36 | Township |
Little Eagle is the largest city in Corson County, with a population of 349.
Prairie View is the smallest city in Corson County, with a population of 20.
There are 10 cities in Corson County, South Dakota.