Data / Rankings / Uninsured rate, ages 18 to 64 (US model-based estimate) / Counties in Washington

Counties in Washington by uninsured rate, ages 18 to 64 (US model-based estimate)

Adams County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 39 counties in 2021, at 23.3%. King County had the lowest, at 7.1%. The median was 10.6% and the figure for Washington was 9.2%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest23.3Adams County
Lowest7.1King County
Median10.639 counties
Washington9.2History

Map of counties, 2021

Adams County: 23.3 %Asotin County: 10.5 %Benton County: 11 %Chelan County: 14.9 %Clallam County: 11.9 %Clark County: 9.8 %Columbia County: 10.6 %Cowlitz County: 10.2 %Douglas County: 16.3 %Ferry County: 11.3 %Franklin County: 17 %Garfield County: 9 %Grant County: 18.5 %Grays Harbor County: 11 %Island County: 7.7 %Jefferson County: 8.7 %King County: 7.1 %Kitsap County: 8 %Kittitas County: 9.8 %Klickitat County: 12.8 %Lewis County: 11.4 %Lincoln County: 8.8 %Mason County: 13.1 %Okanogan County: 18 %Pacific County: 12.3 %Pend Oreille County: 9.6 %Pierce County: 8.7 %San Juan County: 12.3 %Skagit County: 10.7 %Skamania County: 8.8 %Snohomish County: 8.6 %Spokane County: 7.6 %Stevens County: 10.1 %Thurston County: 8.3 %Wahkiakum County: 11.9 %Walla Walla County: 10.9 %Whatcom County: 9.5 %Whitman County: 8.4 %Yakima County: 20.5 %
  • Under 8.6
  • 8.6 to 9.6
  • 9.6 to 11
  • 11 to 12
  • 12 to 14
  • 14 and over
%, 2021. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Adams County: 23.3 %Adams County23.3Yakima County: 20.5 %Yakima County20.5Grant County: 18.5 %Grant County18.5Okanogan County: 18 %Okanogan County18Franklin County: 17 %Franklin County17Douglas County: 16.3 %Douglas County16.3Chelan County: 14.9 %Chelan County14.9Mason County: 13.1 %Mason County13.1Klickitat County: 12.8 %Klickitat County12.8Pacific County: 12.3 %Pacific County12.3San Juan County: 12.3 %San Juan County12.3Clallam County: 11.9 %Clallam County11.9Wahkiakum County: 11.9 %Wahkiakum County11.9Lewis County: 11.4 %Lewis County11.4Ferry County: 11.3 %Ferry County11.3Benton County: 11 %Benton County11Grays Harbor County: 11 %Grays Harbor County11Walla Walla County: 10.9 %Walla Walla County10.9Skagit County: 10.7 %Skagit County10.7Columbia County: 10.6 %Columbia County10.6Asotin County: 10.5 %Asotin County10.5Cowlitz County: 10.2 %Cowlitz County10.2Stevens County: 10.1 %Stevens County10.1Clark County: 9.8 %Clark County9.8Kittitas County: 9.8 %Kittitas County9.8Pend Oreille County: 9.6 %Pend Oreille County9.6Whatcom County: 9.5 %Whatcom County9.5Garfield County: 9 %Garfield County9Lincoln County: 8.8 %Lincoln County8.8Skamania County: 8.8 %Skamania County8.8Jefferson County: 8.7 %Jefferson County8.7Pierce County: 8.7 %Pierce County8.7Snohomish County: 8.6 %Snohomish County8.6Whitman County: 8.4 %Whitman County8.4Thurston County: 8.3 %Thurston County8.3Kitsap County: 8 %Kitsap County8Island County: 7.7 %Island County7.7Spokane County: 7.6 %Spokane County7.6King County: 7.1 %King County7.1Adams County: 23.3 %Adams County23.3Yakima County: 20.5 %Yakima County20.5Grant County: 18.5 %Grant County18.5Okanogan County: 18 %Okanogan County18Franklin County: 17 %Franklin County17Douglas County: 16.3 %Douglas County16.3Chelan County: 14.9 %Chelan County14.9Mason County: 13.1 %Mason County13.1Klickitat County: 12.8 %Klickitat County12.8Pacific County: 12.3 %Pacific County12.3San Juan County: 12.3 %San Juan County12.3Clallam County: 11.9 %Clallam County11.9Wahkiakum County: 11.9 %Wahkiakum County11.9Lewis County: 11.4 %Lewis County11.4Ferry County: 11.3 %Ferry County11.3Benton County: 11 %Benton County11Grays Harbor County: 11 %Grays Harbor County11Walla Walla County: 10.9 %Walla Walla County10.9Skagit County: 10.7 %Skagit County10.7Columbia County: 10.6 %Columbia County10.6Asotin County: 10.5 %Asotin County10.5Cowlitz County: 10.2 %Cowlitz County10.2Stevens County: 10.1 %Stevens County10.1Clark County: 9.8 %Clark County9.8Kittitas County: 9.8 %Kittitas County9.8Pend Oreille County: 9.6 %Pend Oreille County9.6Whatcom County: 9.5 %Whatcom County9.5Garfield County: 9 %Garfield County9Lincoln County: 8.8 %Lincoln County8.8Skamania County: 8.8 %Skamania County8.8Jefferson County: 8.7 %Jefferson County8.7Pierce County: 8.7 %Pierce County8.7Snohomish County: 8.6 %Snohomish County8.6Whitman County: 8.4 %Whitman County8.4Thurston County: 8.3 %Thurston County8.3Kitsap County: 8 %Kitsap County8Island County: 7.7 %Island County7.7Spokane County: 7.6 %Spokane County7.6King County: 7.1 %King County7.1
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)Change on 2020
1Adams County23.3+3.3 pts
2Yakima County20.5+0.9 pts
3Grant County18.5+1.4 pts
4Okanogan County18+0.1 pts
5Franklin County17-0.9 pts
6Douglas County16.3-1.2 pts
7Chelan County14.9+1.1 pts
8Mason County13.1+0.4 pts
9Klickitat County12.80 pts
10Pacific County12.3-0.3 pts
10San Juan County12.3+0.7 pts
12Clallam County11.9+0.7 pts
12Wahkiakum County11.9+1.9 pts
14Lewis County11.4+0.1 pts
15Ferry County11.3-0.3 pts
16Benton County11+0.8 pts
16Grays Harbor County110 pts
18Walla Walla County10.9-0.8 pts
19Skagit County10.7-0.2 pts
20Columbia County10.6+2.5 pts
21Asotin County10.5+0.8 pts
22Cowlitz County10.2+1 pts
23Stevens County10.1+0.3 pts
24Clark County9.8+0.6 pts
24Kittitas County9.8+0.6 pts
26Pend Oreille County9.6-0.4 pts
27Whatcom County9.5-0.7 pts
28Garfield County9+1.8 pts
29Lincoln County8.8+0.3 pts
29Skamania County8.8-0.1 pts
31Jefferson County8.7-1.6 pts
31Pierce County8.7+0.4 pts
33Snohomish County8.6-0.1 pts
34Whitman County8.4-0.1 pts
35Thurston County8.3+0.1 pts
36Kitsap County8+0.8 pts
37Island County7.7-0.7 pts
38Spokane County7.6-0.1 pts
39King County7.1+0.1 pts

Other periods

About this ranking

People aged 18 to 64 without health insurance coverage of any kind, as a percentage of all people aged 18 to 64. United States: Census Bureau Small Area Health Insurance Estimates (SAHIE) for states and counties, all races, both sexes and all income levels.

A model-based single-year estimate that combines the American Community Survey with administrative records and population estimates, so every county gets a figure. Covers states and counties only, because the SAHIE dataset files have no national row. The Census Bureau advises comparing years from 2008 on only; 2013 is the updated release. Working-age adults; the rate for everyone under 65 is uninsured_rate_under_65.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties (Counties in Washington by uninsured rate, ages 18 to 64 (US model-based estimate), 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Washington by uninsured rate, ages 18 to 64 (US model-based estimate), 2021. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Counties in Washington by uninsured rate, ages 18 to 64 (US model-based estimate), 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2021.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Washington by uninsured rate, ages 18 to 64 (US model-based estimate), 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_washington_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Washington by uninsured rate, ages 18 to 64 (US model-based estimate), 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2021. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Washington by uninsured rate, ages 18 to 64 (US model-based estimate), 2021
PY  - 2026
DA  - 2026/08/06
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip. Retrieved 2026-10-12.
ER  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Washington by uninsured rate, ages 18 to 64 (US model-based estimate) using official data, and cite the source.
rank_places {"indicator":"uninsured_rate_18_64","level":"province","within":"Washington","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=uninsured_rate_18_64&level=province&within=Washington&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest uninsured rate, ages 18 to 64 (US model-based estimate)?

Adams County, with 23.3% in 2021, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 18 to 64 (US model-based estimate)?

King County, with 7.1% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, ages 18 to 64 (US model-based estimate): other rankings

Counties in Washington: more rankings