34 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Brookings | 1 | 24,947 | 23,359 | 1.29% | 1,788 | 13.96 | City |
| Volga | 2 | 2,492 | 2,111 | 3.15% | 2,178 | 1.14 | City |
| Medary township | 3 | 1,558 | 1,442 | 1.23% | 47 | 33.25 | Township |
| Aurora | 4 | 1,211 | 1,053 | 2.71% | 1,447 | 0.84 | Town |
| Elkton | 5 | 790 | 754 | 0.89% | 529 | 1.49 | City |
| White | 6 | 548 | 532 | 0.55% | 628 | 0.87 | City |
| Brookings township | 7 | 454 | 425 | 1.11% | 17 | 26.89 | Township |
| Sterling township | 8 | 432 | 398 | 1.41% | 12 | 35.40 | Township |
| Lake Poinsett | 9 | 424 | 480 | -1.17% | 87 | 4.89 | CDP |
| Volga township | 10 | 407 | 376 | 1.5% | 12 | 33.62 | Township |
| Aurora township | 11 | 306 | 281 | 1.66% | 9 | 32.48 | Township |
| Lake Hendricks township | 12 | 264 | 243 | 1.54% | 9 | 30.77 | Township |
| Sherman township | 13 | 262 | 248 | 0.77% | 7 | 35.29 | Township |
| Alton township | 14 | 260 | 244 | 0.78% | 7 | 35.17 | Township |
| Argo township | 15 | 235 | 210 | 2.62% | 7 | 36.15 | Township |
| Afton township | 16 | 227 | 213 | 0.89% | 6 | 35.48 | Township |
| Oslo township | 17 | 222 | 210 | 0.45% | 6 | 35.61 | Township |
| Bruce | 18 | 218 | 210 | 0.93% | 589 | 0.37 | City |
| Oakwood township | 19 | 209 | 194 | 1.46% | 6 | 32.41 | Township |
| Richland township | 20 | 182 | 164 | 2.25% | 6 | 33.09 | Township |
| Trenton township | 21 | 181 | 170 | 0.56% | 5 | 35.07 | Township |
| Laketon township | 22 | 180 | 165 | 1.69% | 5 | 33.98 | Township |
| Lake Sinai township | 23 | 178 | 167 | 0.56% | 5 | 33.27 | Township |
| Bangor township | 24 | 172 | 161 | 0.58% | 5 | 34.90 | Township |
| Preston township | 25 | 172 | 155 | 2.38% | 5 | 35.44 | Township |
| Parnell township | 26 | 165 | 156 | 0.61% | 5 | 35.73 | Township |
| Winsor township | 27 | 158 | 148 | 0.64% | 4 | 35.57 | Township |
| Elkton township | 28 | 115 | 108 | 0.88% | 6 | 20.31 | Township |
| Aurora township | 29 | 112 | 106 | 0.9% | 3 | 35.52 | Township |
| Sinai | 30 | 104 | 96 | 1.96% | 283 | 0.37 | Town |
| Oak Lake township | 31 | 98 | 92 | 1.03% | 3 | 35.80 | Township |
| White township | 32 | 92 | 86 | 1.1% | 3 | 35.59 | Township |
| Bushnell | 33 | 72 | 74 | 0% | 101 | 0.71 | Town |
| Hetland | 34 | 18 | 18 | 0% | 158 | 0.11 | Town |
Brookings is the largest city in Brookings County, with a population of 24,947.
Hetland is the smallest city in Brookings County.
There are 34 cities in Brookings County, South Dakota.