Washington County's estimated 2026 population is 614,803 with a growth rate of 0.51% 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 15.64% since that time.
Data after 2023 is projected based on recent change
Overall: 38.1 years
Female: 38.9 years
Male: 37.3 years
There are 473,722 adults, (89,208 of whom are seniors) in Washington County.
Female: 302,367 (50.1%)
Male: 301,580 (49.9%)
The racial composition of Washington County includes 63.49% White, 11.5% Asian, 7.45% other race, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 383,443 | 63.49% |
| Two or more races | 83,241 | 13.78% |
| Asian | 69,474 | 11.5% |
| Other race | 45,020 | 7.45% |
| Black or African American | 13,996 | 2.32% |
| Native American | 5,533 | 0.92% |
| Native Hawaiian or Pacific Islander | 3,240 | 0.54% |
Washington County's average per capita income is $64,586. Household income levels show a median of $107,772. The poverty rate stands at 8.05%.
Name | Median | Mean |
|---|---|---|
| Married Families | $148,225 | $179,023 |
| Families | $127,794 | $159,833 |
| Households | $107,772 | $137,880 |
| Non Families | $68,898 | $87,211 |
Average Income
Median Household Income
Poverty Rate
