Dewey County's estimated 2026 population is 5,456 with a growth rate of 0.68% in the past year according to the most recent United States census data. Dewey County is the 33rd largest county in South Dakota. The 2010 population was 5,325 and has seen a growth of 2.46% since that time.
Data after 2023 is projected based on recent change
Overall: 27.7 years
Female: 29 years
Male: 25.7 years
There are 3,209 adults, (518 of whom are seniors) in Dewey County.
Female: 2,603 (50%)
Male: 2,602 (50%)
The racial composition of Dewey County includes 74.2% Native American, 21.02% White, and smaller percentages for Black or African American, Asian and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| Native American | 3,862 | 74.2% |
| White | 1,094 | 21.02% |
| Two or more races | 219 | 4.21% |
| Black or African American | 27 | 0.52% |
| Asian | 3 | 0.06% |
Dewey County's average per capita income is $39,533. Household income levels show a median of $54,104. The poverty rate stands at 33.04%.
Name | Median | Mean |
|---|---|---|
| Married Families | $96,786 | - |
| Families | $62,926 | $75,582 |
| Households | $54,104 | $68,205 |
| Non Families | $34,655 | $45,493 |
Average Income
Median Household Income
Poverty Rate