| Name | Washington County |
| State | Oregon |
| FIPS Code | 41067 |
| County Seat | Hillsboro |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2024) | 604,831 |
| Population Growth Rate(2020-2024) | 0.74% |
| Majority Ethnicity | White 66.61% |
| Public School Majority Ethnicity | White 46% |
| Partisan Voting Index | Democratic:+16 |
| Unemployment Rate (May 2026) | 5.4% |
| Sales Tax Rate (2025) | 0% |
| Area Code(s) | 503 / 971 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 66.61% |
| African American | 2.31% |
| Hispanic | 18.37% |
| Asian | 11.29% |
| Native American | 0.9% |
| Hawaiin/Pacific Islander | 0.51% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 45.96% |
| African American | 2.61% |
| Hispanic | 30.92% |
| Asian | 11.14% |
| Native American | 0.43% |
| Hawaiin/Pacific Islander | 1.01% |