3 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Plankinton | 1 | 762 | 764 | 0% | 999 | 1 | City |
| White Lake | 2 | 397 | 393 | 0.25% | 980 | 0 | City |
| Stickney | 3 | 310 | 318 | -0.32% | 1,157 | 0 | Town |
Plankinton is the largest city in Aurora County, with a population of 762.
Stickney is the smallest city in Aurora County, with a population of 310.
There are 3 cities in Aurora County, South Dakota.