| Name | Custer County |
| State | Idaho |
| FIPS Code | 16037 |
| County Seat | Challis |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2024) | 4,531 |
| Population Growth Rate(2020-2024) | 5.63% |
| Majority Ethnicity | White 93.43% |
| Public School Majority Ethnicity | White 90% |
| Partisan Voting Index | Strongly Republican:+28 |
| Unemployment Rate (May 2026) | 6.1% |
| Sales Tax Rate (2025) | 6% |
| Area Code(s) | 208 / 986 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 93.43% |
| African American | 0.28% |
| Hispanic | 3.09% |
| Asian | 2.76% |
| Native American | 0.45% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 89.8% |
| African American | 0% |
| Hispanic | 8.23% |
| Asian | 0% |
| Native American | 0.36% |
| Hawaiin/Pacific Islander | 0.54% |