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Home/Housing Assessments/King County, WA

King County, WA

Housing Needs Assessment

DemographicsEconomyHomeownershipHousing Supply

Demographics

Population

2.32M

2025

5-Year Growth Rate

+1.92%

2021-2025

Median Age

37.1

2024

Foreign Born

24.6%

2024

Age 65+

14.2%

2024

AI Summary

King County, home to Seattle, continues to grow at a steady pace with a population of 2.32 million. The county's growth rate of 1.92% is driven by continued tech industry expansion and international migration, as reflected in the 24.6% foreign-born population.

The median age of 37.1 is slightly above the national median, with the 65+ population at 14.2% and growing. This aging trend is creating increased demand for senior-friendly housing options and multigenerational living arrangements across the county.

Economy

Median Income

$110.8K

2024

Unemployment Rate

3.4%

2025 EOY

Total Employment

1.28M

2025

5-Year Income Growth

+3.85%

2019-2024

AI Summary

King County boasts one of the highest median incomes in the nation at $110,800, anchored by major employers in technology, aerospace, and healthcare. The unemployment rate of 3.4% reflects ongoing demand for skilled workers.

Homeownership

Homeownership Rate

55.1%

Median Home Value

$725K

5-Year Change

-2.3 ppts

Affordability Ratio

6.54

AI Summary

Homeownership in King County has declined 2.3 percentage points to 55.1%, with a median home value of $725,000 presenting a significant barrier to entry for many households.

Housing Costs

Median Home Value

$725K

+7.1% annualized since 2019

Median Rent

$1,920

+5.2% annualized since 2019

Price-to-Income Ratio

6.54

median price to median income

AI Summary

Housing costs in King County rank among the highest in the Pacific Northwest, with home values appreciating at 7.1% annually. The price-to-income ratio of 6.54 underscores severe affordability constraints.

Housing Supply

Total Units

942K

Vacancy Rate

5.8%

Multifamily Share

45.3%

Diversity Index

0.72

AI Summary

King County's housing stock of 942,000 units features a high multifamily share of 45.3%, concentrated in the Seattle metro core. The low vacancy rate of 5.8% indicates persistent supply constraints.

Renter Housing Needs

Renter Median Income

$68.2K

Affordability Gap

$520

Hours to Afford Rent

58.1 hrs/wk

Unit Shortage (<$35k)

42.1K

AI Summary

Despite higher renter incomes, King County renters face a monthly affordability gap of $520. The shortage of 42,100 units affordable to households earning under $35,000 highlights an acute need for deeply affordable housing.

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