Discover the city of Brookings, SD, the county seat of Brookings County. According to the US Census Bureau's 2013 Statistics, the population of Brookings is estimated at 22,943 residents. Based on the US Census Bureau’s count of 18,503 residents in the year 2000, the city has been growing at an average of about 1% per year. Brookings is an affordable place to live, where the median cost for an owner-occupied home is $145,800, compared to a $181,400 median home price for the nation. Median household income in Brookings, SD is $41,468 vs. $53,046 nationally, but the overall cost of living in Brookings is lower than the national average.