| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Brookings | 1 | 25,725 | 23,370 | 1.46% | 1,843 | 14 | City |
| Volga | 2 | 2,534 | 2,107 | 3.09% | 2,215 | 1 | City |
| Aurora | 3 | 1,316 | 1,053 | 2.33% | 1,572 | 1 | Town |
| Elkton | 4 | 808 | 756 | 1.13% | 541 | 1 | City |
| White | 5 | 578 | 532 | 1.23% | 662 | 1 | City |
| Bruce | 6 | 220 | 210 | 0.46% | 595 | 0 | City |
| Sinai | 7 | 103 | 94 | 0.98% | 280 | 0 | Town |
| Bushnell | 8 | 76 | 72 | 0% | 107 | 1 | Town |
| Hetland | 9 | 20 | 20 | 0% | 175 | 0 | Town |
Brookings is the largest city in Brookings County, with a population of 25,725.
Hetland is the smallest city in Brookings County, with a population of 20.
There are 9 cities in Brookings County, South Dakota.