| Name | Dewey County |
| State | South Dakota |
| FIPS Code | 46041 |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2022) | 5,358 |
| Population Growth Rate(2000-2022) | -1.17% |
| Majority Ethnicity | Native American 78.52% |
| Public School Majority Ethnicity | Native American 89% |
| Partisan Voting Index | Democratic:+8 |
| Unemployment Rate | 4.2% |
| Race/Ethnicy | Percentage of Population (2018) |
|---|---|
| White | 20.28% |
| African American | 0.1% |
| Hispanic | 1.01% |
| Asian | 0.09% |
| Native American | 78.52% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicy | Percentage of Public School Students (2018) |
|---|---|
| White | 10.31% |
| African American | 0.06% |
| Hispanic | 0.5% |
| Asian | 0.06% |
| Native American | 89% |
| Hawaiin/Pacific Islander | 0.06% |