King County
King County is significantly wealthier than the US average, with a median household income of $124,746. Population has grown 32% since 2000. 57% of adults hold a bachelor's degree or higher, well above the national rate of 36%. Median home value has more than tripled since 2000, reaching $859,900. It ranks in the top 1% of US counties for household income. Households here earn about 27% more than the Washington median.
Population & growth
PEP 2025 EST:2,344,939 residents (Census Bureau Vintage 2025, released March 2026)
Income & economy
Housing
Race & ethnicity
Detailed origins & ancestry
+ 10 more hispanic origin groups with data
+ 13 more asian origin groups with data
+ 51 more ancestry groups with data
Education
Commute & transportation
Work & employment
People & community
Places similar to King County
Compare King County to nearby counties
How many people live in King County, Washington?
King County, Washington has about 2,287,171 residents according to the 2024 American Community Survey.
What is the median household income in King County, Washington?
The typical household in King County, Washington earns about $124,746 a year. Half of households make more than that, and half make less.
Is King County, Washington expensive?
In King County, Washington, the median home is worth about $859,900, and the typical rent is about $2,092 a month.
How educated are people in King County, Washington?
About 56.7% of adults age 25 and over in King County, Washington hold a bachelor's degree or higher.
What is the poverty rate in King County, Washington?
About 8.6% of people in King County, Washington live below the federal poverty line.
Has King County, Washington grown since 1990?
Yes, King County, Washington has grown since 1990. The population has added about 779,852 residents, a change of about 52 percent over that period.
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024