9 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Brookings | 1 | 25,147 | 23,371 | 1.19% | 1,802 | 14 | City |
| Volga | 2 | 2,516 | 2,108 | 2.78% | 2,199 | 1 | City |
| Aurora | 3 | 1,211 | 1,055 | 2.19% | 1,447 | 1 | Town |
| Elkton | 4 | 789 | 755 | 0.77% | 528 | 1 | City |
| White | 5 | 565 | 531 | 1.07% | 647 | 1 | City |
| Bruce | 6 | 219 | 210 | 0.92% | 592 | 0 | City |
| Sinai | 7 | 103 | 94 | 1.98% | 280 | 0 | Town |
| Bushnell | 8 | 75 | 72 | 1.35% | 105 | 1 | Town |
| Hetland | 9 | 18 | 18 | 0% | 158 | 0 | Town |
Brookings is the largest city in Brookings County, with a population of 25,147.
Hetland is the smallest city in Brookings County, with a population of 18.
There are 9 cities in Brookings County, South Dakota.