Population Demographics
As of 2024 the population of Brookings County, SD is 35,763. The population is expected to grow to 37,125 by 2029 - a growth rate of 0.75%.
The median age of Brookings County, SD residents is 30.
The diversity index of Brookings County, SD is 31.3, meaning that there is a 31% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.