| Name | Mellette County |
| State | South Dakota |
| FIPS Code | 46095 |
| County Seat | White River |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 2,057 |
| Population Growth Rate(2000-2022) | -6.35% |
| Majority Ethnicity | Hispanic 65.62% |
| Public School Majority Ethnicity | Native American 82% |
| Partisan Voting Index | Republican:+9 |
| Unemployment Rate (November 2024) | 2.5% |
| Area Code(s) | 605 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 33.6% |
| African American | 0.26% |
| Hispanic | 65.62% |
| Asian | 0% |
| Native American | 0.26% |
| Hawaiin/Pacific Islander | 0.26% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 10.26% |
| African American | 0% |
| Hispanic | 0.95% |
| Asian | 0.24% |
| Native American | 81.62% |
| Hawaiin/Pacific Islander | 0% |