Population Demographics
As of 2025 the population of Brookings, SD is 25,031. The population is expected to grow to 26,073 by 2030 - a growth rate of 0.82%.
The median age of Brookings, SD residents is 28.
The diversity index of Brookings, SD is 35.6, meaning that there is a 36% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.