Brookings County's 2026 population is estimated at 38,456, reflecting a 2.18% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Brookings County is the 4th largest county in South Dakota. The 2010 population was 32,003 and has grown 20.16% since 2010.
Overall: 28 years
Female: 28 years
Male: 28 years
There are 27,898 adults, (4,736 of whom are seniors) in Brookings County.
Female: 17,358 (49.1%)
Male: 17,995 (50.9%)
The racial composition of Brookings County includes 87.87% White, 3.28% Asian, and smaller percentages for other race, Native American, Black or African American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 31,063 | 87.87% |
| Two or more races | 1,572 | 4.45% |
| Asian | 1,160 | 3.28% |
| Other race | 697 | 1.97% |
| Native American | 460 | 1.3% |
| Black or African American | 401 | 1.13% |
Brookings County 's average per capita income is $51,013. Household income levels show a median of $70,064. The poverty rate stands at 13.16%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $112,284 | - |
| Families | $106,433 | $119,323 |
| Households | $70,064 | $89,400 |
| Non Families | $47,037 | $56,636 |
Average Income
Median Household Income
Poverty Rate