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