Corson County's 2026 population is estimated at 3,729, reflecting a -0.24% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Corson County is the 42nd largest county in South Dakota. The 2010 population was 4,064 and has grown -8.24% since 2010.
Data after 2023 is projected based on recent change
Overall: 29.9 years
Female: 29.6 years
Male: 30.2 years
There are 2,461 adults, (501 of whom are seniors) in Corson County.
Female: 1,916 (50.3%)
Male: 1,890 (49.7%)
The racial composition of Corson County includes 66.68% Native American, 29.9% White, and smaller percentages for other race and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Native American | 2,538 | 66.68% |
| White | 1,138 | 29.9% |
| Two or more races | 116 | 3.05% |
| Other race | 14 | 0.37% |
Corson County 's average per capita income is $40,543. Household income levels show a median of $46,406. The poverty rate stands at 44.25%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $79,453 | - |
| Families | $48,333 | $74,766 |
| Households | $46,406 | $73,764 |
| Non Families | $40,833 | $67,658 |
Average Income
Median Household Income
Poverty Rate