Ziebach County's 2026 population is estimated at 2,610, reflecting a 3.82% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Ziebach County is the 52nd largest county in South Dakota. The 2010 population was 2,826 and has grown -7.64% since 2010.
Data after 2023 is projected based on recent change
Overall: 36.7 years
Female: 36.1 years
Male: 38.3 years
There are 1,777 adults, (279 of whom are seniors) in Ziebach County.
Female: 1,192 (50.1%)
Male: 1,185 (49.9%)
The racial composition of Ziebach County includes 69.79% Native American, 27.22% White, and smaller percentages for Two or more races, Native Hawaiian or Pacific Islander, other race and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Native American | 1,659 | 69.79% |
| White | 647 | 27.22% |
| Two or more races | 60 | 2.52% |
| Native Hawaiian or Pacific Islander | 7 | 0.29% |
| Other race | 4 | 0.17% |
Ziebach County 's average per capita income is $38,205. Household income levels show a median of $53,958. The poverty rate stands at 33.49%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $91,250 | - |
| Households | $53,958 | $81,078 |
| Families | $48,000 | $85,518 |
| Non Families | $44,464 | $53,173 |
Average Income
Median Household Income
Poverty Rate