Washington County's estimated 2026 population is 624,154 with a growth rate of 1.04% in the past year according to the most recent United States census data. Washington County is the 2nd largest county in Oregon. The 2010 population was 531,652 and has seen a growth of 17.4% since that time.
Data after 2023 is projected based on recent change
The racial composition of Washington County includes 65.97% White, 11.18% Asian, 6.9% other race, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (65.97%)
Two or more races (12.25%)
Asian (11.18%)
Other race (6.9%)
Black or African American (2.29%)
Native American (0.89%)
Native Hawaiian or Pacific Islander (0.51%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 396,022 | 65.97% |
| Two or more races | 73,529 | 12.25% |
| Asian | 67,098 | 11.18% |
| Other race | 41,423 | 6.9% |
| Black or African American | 13,763 | 2.29% |
| Native American | 5,370 | 0.89% |
| Native Hawaiian or Pacific Islander | 3,061 | 0.51% |
Married
Widowed
Divorced
Separated
Never Married
Washington County's average per capita income is $61,975. Household income levels show a median of $104,434. The poverty rate stands at 7.98%.
Name | Median | Mean |
|---|---|---|
| Married Families | $143,584 | $174,318 |
| Families | $123,005 | $155,392 |
| Households | $104,434 | $133,965 |
| Non Families | $67,006 | $84,836 |
Average Income
Median Household Income
Poverty Rate
