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Health insurance in King County, Washington

56,270 people here have no coverage and earn in the range a premium tax credit is built for — 46% of everyone uninsured in the county.

Reviewed September 4, 2026 · 2024 Census data

56,270Uninsured, subsidy range 138–400% of poverty
6.2%Uninsured, under 65 123,237 people
5.1%Uninsured, 50 to 64 20,581 people
1,996,671Under-65 residents 11th of 3,143

Source: US Census Small Area Health Insurance Estimates, 2024 release. Income bands are measured against the federal poverty level.

How many here a premium tax credit would reach

King County has 56,270 uninsured residents earning inside the premium tax credit range, 46% of its uninsured total. That is near the 51% national median. Within that band itself, 11.4% have no coverage.

How many people here have no coverage

6.2% of King County's 1,996,671 under-65 residents have no health coverage — 123,237 people. That is below the Washington rate of 7.8%, and puts King County in the bottom quarter of the 3,143 counties measured nationally (2,766th).

Who falls under the Medicaid line

32,840 of King County's uninsured — 27%, close to the 31% typical nationally — earn under $22,025 a year, which in Washington is Medicaid territory rather than marketplace territory.

The years before Medicare

20,581 people aged 50 to 64 in King County have no coverage, a rate of 5.1% — close to the 6.2% across all under-65 residents here. Age-rated premiums make this the most expensive group to cover before Medicare.

King County against Washington

King County is the largest of the 14 Washington counties we publish, by under-65 population. Its uninsured rate runs 1.6 points lower than Washington overall and 4 points fewer of its uninsured sit in the subsidy band than statewide. Coverage among 50 to 64 year olds is better here than across Washington.

King CountyWashington National median
Uninsured, under 656.2% 7.8%9.8%
Uninsured in the subsidy band56,270 256,620—
Subsidy band as a share of uninsured46% 50% 51%
At or below 138% of poverty27% 25% 31%
Uninsured, 50 to 645.1% 6.5% 8.1%

The next largest counties

CountyUninsured In the subsidy bandShare
Pierce County7.0%28,84852%
Snohomish County7.6%27,17749%
Spokane County7.4%17,31052%
Clark County7.6%17,48452%
Clark County (Nevada)14.1%151,25354%

What a plan actually costs in King County

These figures say how many people here a credit would reach. What it would be worth to you depends on your age, household and income — a licensed agent can work that out on the call.

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