Bennett County's 2026 population is estimated at 3,243, reflecting a -0.7% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Bennett County is the 45th largest county in South Dakota. The 2010 population was 3,451 and has grown -6.03% since 2010.
Data after 2023 is projected based on recent change
Overall: 27.4 years
Female: 28.2 years
Male: 26.6 years
There are 2,171 adults, (512 of whom are seniors) in Bennett County.
Female: 1,726 (51.6%)
Male: 1,619 (48.4%)
The racial composition of Bennett County includes 58.06% Native American, 36.29% White, and smaller percentages for Two or more races, Asian, other race, Black or African American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Native American | 1,942 | 58.06% |
| White | 1,214 | 36.29% |
| Two or more races | 98 | 2.93% |
| Asian | 49 | 1.46% |
| Other race | 36 | 1.08% |
| Black or African American | 6 | 0.18% |
Bennett County 's average per capita income is $42,879. Household income levels show a median of $53,750. The poverty rate stands at 29.94%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $88,030 | - |
| Families | $59,643 | $64,049 |
| Households | $53,750 | $59,835 |
| Non Families | $43,529 | $40,005 |
Average Income
Median Household Income
Poverty Rate