| Name | Sioux County |
| State | North Dakota |
| FIPS Code | 38085 |
| County Seat | Fort Yates |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 4,193 |
| Population Growth Rate(2000-2022) | -6.14% |
| Majority Ethnicity | Hispanic 87.04% |
| Public School Majority Ethnicity | Native American 99% |
| Partisan Voting Index | Democratic:+19 |
| Unemployment Rate (January 2025) | 3.1% |
| Area Code(s) | 701 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 12.7% |
| African American | 0.26% |
| Hispanic | 87.04% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 0.77% |
| African American | 0% |
| Hispanic | 0.22% |
| Asian | 0% |
| Native American | 98.8% |
| Hawaiin/Pacific Islander | 0.11% |