King County's estimated 2026 population is 2,371,919 with a growth rate of 1.15% in the past year according to the most recent United States census data. King County is the largest county in Washington. The 2010 population was 1,938,431 and has seen a growth of 22.36% since that time.
Data after 2023 is projected based on recent change
Overall: 37.4 years
Female: 38 years
Male: 36.8 years
There are 1,841,577 adults, (320,899 of whom are seniors) in King County.
Female: 1,127,866 (49.3%)
Male: 1,159,305 (50.7%)
The racial composition of King County includes 54.7% White, 20.67% Asian, 6.56% Black or African American, 5.04% other race, and smaller percentages for Native Hawaiian or Pacific Islander, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 1,251,054 | 54.7% |
| Asian | 472,849 | 20.67% |
| Two or more races | 266,129 | 11.64% |
| Black or African American | 149,956 | 6.56% |
| Other race | 115,259 | 5.04% |
| Native Hawaiian or Pacific Islander | 17,249 | 0.75% |
| Native American | 14,675 | 0.64% |
King County's average per capita income is $79,039. Household income levels show a median of $124,746. The poverty rate stands at 8.59%.
Name | Median | Mean |
|---|---|---|
| Married Families | $187,574 | $243,085 |
| Families | $160,840 | $217,293 |
| Households | $124,746 | $176,799 |
| Non Families | $82,396 | $116,471 |
Average Income
Median Household Income
Poverty Rate