| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Plankinton | 1 | 780 | 764 | 0.39% | 1,022 | 1 | City |
| White Lake | 2 | 412 | 397 | 0.49% | 1,017 | 0 | City |
| Stickney | 3 | 319 | 319 | 0% | 1,190 | 0 | Town |
Plankinton is the largest city in Aurora County, with a population of 780.
Stickney is the smallest city in Aurora County, with a population of 319.
There are 3 cities in Aurora County, South Dakota.