5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Herreid | 1 | 397 | 416 | -1% | 277 | 1.44 | City |
| Pollock | 2 | 219 | 226 | -0.46% | 682 | 0.32 | Town |
| Mound City | 3 | 63 | 67 | -1.56% | 496 | 0.13 | Town |
| Artas | 4 | 8 | 8 | 0% | 77 | 0.10 | Town |
| Lowry | 5 | 5 | 5 | 0% | 20 | 0.25 | Town |
Herreid is the largest city in Campbell County, with a population of 397.
Lowry is the smallest city in Campbell County.
There are 5 cities in Campbell County, South Dakota.