| Name | Jefferson County |
| State | Oregon |
| FIPS Code | 41031 |
| County Seat | Madras |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2024) | 25,480 |
| Population Growth Rate(2020-2024) | 3.83% |
| Majority Ethnicity | White 63.49% |
| Public School Majority Ethnicity | White 37% |
| Partisan Voting Index | Republican:+14 |
| Unemployment Rate (May 2026) | 6.5% |
| Sales Tax Rate (2025) | 0% |
| Area Code(s) | 458 / 541 / 503 / 971 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 63.49% |
| African American | 0.71% |
| Hispanic | 21.22% |
| Asian | 0.59% |
| Native American | 13.85% |
| Hawaiin/Pacific Islander | 0.13% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 36.53% |
| African American | 0.35% |
| Hispanic | 34.25% |
| Asian | 0.23% |
| Native American | 25.04% |
| Hawaiin/Pacific Islander | 0.17% |