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)

Okanogan County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 39 counties in 2023, at 19.8%. King County had the lowest, at 6.8%. The median was 9.9% and the figure for Washington was 8.9%. Source: the U.S. Census Bureau.

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Highest19.8Okanogan County
Lowest6.8King County
Median9.939 counties
Washington8.9History

Map of counties, 2023

Adams County: 18.9 %Asotin County: 8.3 %Benton County: 10.4 %Chelan County: 14 %Clallam County: 9.7 %Clark County: 9.9 %Columbia County: 9 %Cowlitz County: 9.7 %Douglas County: 16 %Ferry County: 10.6 %Franklin County: 16.8 %Garfield County: 8.8 %Grant County: 17.9 %Grays Harbor County: 13 %Island County: 7.7 %Jefferson County: 7.6 %King County: 6.8 %Kitsap County: 7.1 %Kittitas County: 8.7 %Klickitat County: 12 %Lewis County: 11 %Lincoln County: 8.2 %Mason County: 11.5 %Okanogan County: 19.8 %Pacific County: 10.6 %Pend Oreille County: 9.1 %Pierce County: 8.5 %San Juan County: 10.3 %Skagit County: 10.9 %Skamania County: 8 %Snohomish County: 8.4 %Spokane County: 8 %Stevens County: 10.3 %Thurston County: 7.1 %Wahkiakum County: 11.6 %Walla Walla County: 10.9 %Whatcom County: 8.2 %Whitman County: 8.7 %Yakima County: 19.2 %
  • Under 8.1
  • 8.1 to 8.7
  • 8.7 to 9.9
  • 9.9 to 11
  • 11 to 14
  • 14 and over
%, 2023. 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, 2023

Okanogan County: 19.8 %Okanogan County19.8Yakima County: 19.2 %Yakima County19.2Adams County: 18.9 %Adams County18.9Grant County: 17.9 %Grant County17.9Franklin County: 16.8 %Franklin County16.8Douglas County: 16 %Douglas County16Chelan County: 14 %Chelan County14Grays Harbor County: 13 %Grays Harbor County13Klickitat County: 12 %Klickitat County12Wahkiakum County: 11.6 %Wahkiakum County11.6Mason County: 11.5 %Mason County11.5Lewis County: 11 %Lewis County11Skagit County: 10.9 %Skagit County10.9Walla Walla County: 10.9 %Walla Walla County10.9Ferry County: 10.6 %Ferry County10.6Pacific County: 10.6 %Pacific County10.6Benton County: 10.4 %Benton County10.4San Juan County: 10.3 %San Juan County10.3Stevens County: 10.3 %Stevens County10.3Clark County: 9.9 %Clark County9.9Clallam County: 9.7 %Clallam County9.7Cowlitz County: 9.7 %Cowlitz County9.7Pend Oreille County: 9.1 %Pend Oreille County9.1Columbia County: 9 %Columbia County9Garfield County: 8.8 %Garfield County8.8Kittitas County: 8.7 %Kittitas County8.7Whitman County: 8.7 %Whitman County8.7Pierce County: 8.5 %Pierce County8.5Snohomish County: 8.4 %Snohomish County8.4Asotin County: 8.3 %Asotin County8.3Lincoln County: 8.2 %Lincoln County8.2Whatcom County: 8.2 %Whatcom County8.2Skamania County: 8 %Skamania County8Spokane County: 8 %Spokane County8Island County: 7.7 %Island County7.7Jefferson County: 7.6 %Jefferson County7.6Kitsap County: 7.1 %Kitsap County7.1Thurston County: 7.1 %Thurston County7.1King County: 6.8 %King County6.8Okanogan County: 19.8 %Okanogan County19.8Yakima County: 19.2 %Yakima County19.2Adams County: 18.9 %Adams County18.9Grant County: 17.9 %Grant County17.9Franklin County: 16.8 %Franklin County16.8Douglas County: 16 %Douglas County16Chelan County: 14 %Chelan County14Grays Harbor County: 13 %Grays Harbor County13Klickitat County: 12 %Klickitat County12Wahkiakum County: 11.6 %Wahkiakum County11.6Mason County: 11.5 %Mason County11.5Lewis County: 11 %Lewis County11Skagit County: 10.9 %Skagit County10.9Walla Walla County: 10.9 %Walla Walla County10.9Ferry County: 10.6 %Ferry County10.6Pacific County: 10.6 %Pacific County10.6Benton County: 10.4 %Benton County10.4San Juan County: 10.3 %San Juan County10.3Stevens County: 10.3 %Stevens County10.3Clark County: 9.9 %Clark County9.9Clallam County: 9.7 %Clallam County9.7Cowlitz County: 9.7 %Cowlitz County9.7Pend Oreille County: 9.1 %Pend Oreille County9.1Columbia County: 9 %Columbia County9Garfield County: 8.8 %Garfield County8.8Kittitas County: 8.7 %Kittitas County8.7Whitman County: 8.7 %Whitman County8.7Pierce County: 8.5 %Pierce County8.5Snohomish County: 8.4 %Snohomish County8.4Asotin County: 8.3 %Asotin County8.3Lincoln County: 8.2 %Lincoln County8.2Whatcom County: 8.2 %Whatcom County8.2Skamania County: 8 %Skamania County8Spokane County: 8 %Spokane County8Island County: 7.7 %Island County7.7Jefferson County: 7.6 %Jefferson County7.6Kitsap County: 7.1 %Kitsap County7.1Thurston County: 7.1 %Thurston County7.1King County: 6.8 %King County6.8
%. 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

RankCounties2023 (%)Change on 2022
1Okanogan County19.8-0.5 pts
2Yakima County19.2+0.3 pts
3Adams County18.9+0.2 pts
4Grant County17.9+0.5 pts
5Franklin County16.8-1.5 pts
6Douglas County16-0.5 pts
7Chelan County14-2.1 pts
8Grays Harbor County13+0.8 pts
9Klickitat County12+0.4 pts
10Wahkiakum County11.6+0.6 pts
11Mason County11.5-1.5 pts
12Lewis County11-0.2 pts
13Skagit County10.9+0.5 pts
13Walla Walla County10.9+0.3 pts
15Ferry County10.60 pts
15Pacific County10.6-1.2 pts
17Benton County10.4-0.3 pts
18San Juan County10.3-0.9 pts
18Stevens County10.3+0.7 pts
20Clark County9.9+1.6 pts
21Clallam County9.7-1.3 pts
21Cowlitz County9.7+0.5 pts
23Pend Oreille County9.1-0.3 pts
24Columbia County90 pts
25Garfield County8.8+0.2 pts
26Kittitas County8.7-1 pts
26Whitman County8.7+1 pts
28Pierce County8.5+0.5 pts
29Snohomish County8.4+0.2 pts
30Asotin County8.3+0.1 pts
31Lincoln County8.2-1.5 pts
31Whatcom County8.2-1.1 pts
33Skamania County8+0.1 pts
33Spokane County8+0.4 pts
35Island County7.7-0.2 pts
36Jefferson County7.6-1.4 pts
37Kitsap County7.1-1.5 pts
37Thurston County7.1-1.1 pts
39King County6.8+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-2023-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), 2023) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-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), 2023. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2023. 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), 2023. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2023.

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), 2023 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_washington_by_2023,
  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), 2023}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2023. 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-2023-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), 2023
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-2023-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2023.
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-2023-csv.zip. Retrieved 2026-10-12.
ER  -
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Questions

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

Okanogan County, with 19.8% in 2023, 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 6.8% in 2023.

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