22 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Plankinton | 1 | 788 | 773 | 0.38% | 1,033 | 0.76 | City |
| White Lake | 2 | 411 | 398 | 0.74% | 1,015 | 0.41 | City |
| Stickney | 3 | 318 | 318 | 0% | 1,187 | 0.27 | Town |
| Plankinton | 4 | 205 | 199 | 0.99% | 6 | 34.08 | Township |
| White Lake | 5 | 85 | 80 | 1.19% | 2 | 35.97 | Township |
| Dudley | 6 | 83 | 80 | 0% | 2 | 34.76 | Township |
| Center | 7 | 81 | 76 | 1.25% | 2 | 35.55 | Township |
| Belford | 8 | 79 | 74 | 1.28% | 2 | 35.95 | Township |
| Palatine | 9 | 70 | 67 | 0% | 2 | 36.83 | Township |
| Hopper | 10 | 68 | 63 | 1.49% | 2 | 36.07 | Township |
| Truro | 11 | 65 | 61 | 1.56% | 2 | 34.96 | Township |
| Pleasant Lake | 12 | 63 | 59 | 1.61% | 2 | 33.89 | Township |
| Firesteel | 13 | 55 | 49 | 3.77% | 1 | 36.88 | Township |
| Lake | 14 | 51 | 51 | 0% | 1 | 34.19 | Township |
| Gales | 15 | 48 | 48 | 0% | 1 | 36.29 | Township |
| Aurora Center | 16 | 43 | 46 | 7.5% | 1,000 | 0.04 | CDP |
| Crystal Lake | 17 | 42 | 42 | 0% | 1 | 35.81 | Township |
| Washington | 18 | 42 | 42 | 0% | 1 | 35.58 | Township |
| Patten | 19 | 40 | 40 | 0% | 1 | 35.62 | Township |
| Pleasant Valley | 20 | 19 | 19 | 0% | 1 | 35.20 | Township |
| Cooper | 21 | 15 | 15 | 0% | 0.00 | 33.91 | Township |
| Storla | 22 | 6 | 21 | 0% | 48 | 0.13 | CDP |
Plankinton is the largest city in Aurora County, with a population of 788.
Storla is the smallest city in Aurora County, with a population of 6.
There are 22 cities in Aurora County, South Dakota.