King County, WA Demographics

The total population of King County is estimated to be 2.25 million with 1.14 million males (50.73%) and 1.11 million females (49.27%). There are 32,815 less females than males in King County.
The median household income in King County was $114,929 in 2021, which marked an an increase of 2,569(2.29%) from $112,360 in 2020. This income is 154.05% of the U.S. median household income of $74,606 (all incomes in 2022 inflation-adjusted dollars).
Per the latest American Community Survey by the Census Bureau, King County sees its highest median household income among householders in the age group of 45 to 64 years old, at $136,234. Overall, the median household income for the county of King County stands at $116,255.
In King County, the median income for all workers aged 15 years and older, regardless of work hours, was $73,797 for males and $46,307 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $103,829 for males and $79,599 for females.
In King County, the demographic landscape is diverse, spanning 7 distinct racial categories among households. Among these, Asian households have the highest median household income at $141,108, while Black or African American households represent the opposite end with the lowest median household income of $65,939.
In 2022, the population of King County was 2,266,789, a 0.61% increase year-by-year from 2021. Previously, in 2021, King County's population was 2,253,038, a decline of 0.93% compared to a population of 2,274,094 in 2020.
The median age in King County, WA is 37.1, as per 2021 ACS 5-Year Estimates. Of the total population, 16.94% were under the age of 15, 20.16% aged 15 to 29, 49.76% aged 30 to 64, 11.44% aged 65 to 84, and 1.70% were 85 years of age and older.
Racial distribution of King County population: 60.52% are White, 6.45% are Black or African American, 0.61% are American Indian and Alaska Native, 18.76% are Asian, 0.73% are Native Hawaiian and other Pacific Islander, 4.39% are some other race and 8.53% are multiracial.