| Name | Custer County |
| State | Montana |
| FIPS Code | 30017 |
| County Seat | Miles City |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2024) | 12,013 |
| Population Growth Rate(2020-2024) | 1.22% |
| Majority Ethnicity | White 94.37% |
| Public School Majority Ethnicity | White 90% |
| Partisan Voting Index | Strongly Republican:+24 |
| Unemployment Rate (May 2026) | 3.8% |
| Sales Tax Rate (2025) | 0% |
| Area Code(s) | 406 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 94.37% |
| African American | 0.36% |
| Hispanic | 3.42% |
| Asian | 0.42% |
| Native American | 1.33% |
| Hawaiin/Pacific Islander | 0.1% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 90.38% |
| African American | 1.48% |
| Hispanic | 2.9% |
| Asian | 0.55% |
| Native American | 3.51% |
| Hawaiin/Pacific Islander | 0.18% |