| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fort Pierre | 1 | 2,175 | 2,113 | 0.42% | 697 | 3 | City |
Fort Pierre is the largest city in Stanley County, with a population of 2,175.
Fort Pierre is the smallest city in Stanley County, with a population of 2,175.
There is 1 city in Stanley County, South Dakota.