| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Buffalo | 1 | 358 | 350 | 0% | 646 | 1 | Town |
| Camp Crook | 2 | 71 | 59 | 2.9% | 511 | 0 | Town |
Buffalo is the largest city in Harding County, with a population of 358.
Camp Crook is the smallest city in Harding County, with a population of 71.
There are 2 cities in Harding County, South Dakota.