| Name | Blaine County |
| State | Montana |
| FIPS Code | 30005 |
| County Seat | Chinook |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2024) | 6,884 |
| Population Growth Rate(2020-2024) | -2.27% |
| Majority Ethnicity | Native American 51.35% |
| Public School Majority Ethnicity | Native American 65% |
| Partisan Voting Index | Republican:+1 |
| Unemployment Rate (May 2026) | 4.2% |
| Sales Tax Rate (2025) | 0% |
| Area Code(s) | 406 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 45.39% |
| African American | 0.45% |
| Hispanic | 2.81% |
| Asian | 0% |
| Native American | 51.35% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 29.24% |
| African American | 0.08% |
| Hispanic | 2.05% |
| Asian | 0.08% |
| Native American | 64.85% |
| Hawaiin/Pacific Islander | 0.23% |