King County, WA Demographics & Local Data

Analyze population trends, housing costs, and the local economy by exploring Map AI.

Area Snapshot

Key statistics on population, economy, housing, and commuting compared to state and national averages. Explore interactive maps for deeper analysis.

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Population

Metric King County Washington Avg U.S. Average
Population 2,258,034 7,740,889 334,821,731
Population density (per sq mi) 979.2 108.5 85.8
Population growth (%/yr) 1.05% 1.20% 0.57%
Median age 38.9 36.2 37.1
Households 923,594 3,012,519 128,459,983

Population Over Time

Year King County

Race & Ethnicity

Group Share

Economy

King County has a the economy index of A, which means it is very prosperous.

Metric King County Washington Avg U.S. Average
Median household income $122,064 $95,177 $78,145
Income growth (%/yr) 6.43% 6.00% 5.07%
Unemployment rate 4.6% 4.9% 5.2%

Detailed wealth and income breakdown →

Housing

Metric King County Washington Avg U.S. Average
Median home price $816,878 $471,160 $242,182
Median rent $2,034 $1,681 $1,342
Homeownership rate 56.0% 63.9% 65.1%

Full housing market analysis →

Mobility & Commuting

The most common departure window is 08:00 AM – 08:29 AM , followed by 07:00 AM – 07:29 AM .

Metric King County Washington Avg U.S. Average
Average commute time (min) 26.1 22.6 22.5
Work from home 26.2% 17.7% 13.4%

Commute and transport details →

Education & Households

King County has a education index of A+, which means it is exceptionally educated.

Metric King County Washington Avg U.S. Average
Bachelor's degree or higher 51.6% 35.1% 31.6%
Average household size 2.39 2.51 2.54

Health

King County has a health index of A+, which means it is exceptionally healthy.

Metric King County Washington Avg U.S. Average
Life expectancy (years) 81.2 79.6 78.3
Self-rated poor health 10.1% 15.4% 16.3%
Smokers 10.5% 16.4% 19.0%