Roberts County's 2026 population is estimated at 10,405, reflecting a 0.59% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Roberts County is the 18th largest county in South Dakota. The 2010 population was 10,189 and has grown 2.12% since 2010.
Data after 2023 is projected based on recent change
Overall: 38.5 years
Female: 38.9 years
Male: 38.2 years
There are 7,334 adults, (2,137 of whom are seniors) in Roberts County.
Female: 5,003 (48.9%)
Male: 5,218 (51.1%)
The racial composition of Roberts County includes 57.04% White, 34.67% Native American, and smaller percentages for Asian, other race, Black or African American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 5,830 | 57.04% |
| Native American | 3,544 | 34.67% |
| Two or more races | 669 | 6.55% |
| Asian | 83 | 0.81% |
| Other race | 62 | 0.61% |
| Black or African American | 33 | 0.32% |
Roberts County 's average per capita income is $42,226. Household income levels show a median of $65,130. The poverty rate stands at 15.72%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $93,826 | - |
| Families | $80,085 | $94,515 |
| Households | $65,130 | $83,087 |
| Non Families | $42,264 | $58,897 |
Average Income
Median Household Income
Poverty Rate