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), 2024

Okanogan County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 39 counties in 2024, at 19.8%. Kitsap County had the lowest, at 7.1%. The median was 10.1% and the figure for Washington was 9.1%. Source: the U.S. Census Bureau.

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Highest19.8Okanogan County
Lowest7.1Kitsap County
Median10.139 counties
Washington9.1History

Map of counties, 2024

Adams County: 19.6 %Asotin County: 8.4 %Benton County: 11.9 %Chelan County: 13.9 %Clallam County: 11 %Clark County: 8.9 %Columbia County: 10.6 %Cowlitz County: 9.8 %Douglas County: 16.1 %Ferry County: 10.1 %Franklin County: 17.9 %Garfield County: 8.1 %Grant County: 18.6 %Grays Harbor County: 12 %Island County: 8.5 %Jefferson County: 8.5 %King County: 7.1 %Kitsap County: 7.1 %Kittitas County: 10 %Klickitat County: 12 %Lewis County: 10.6 %Lincoln County: 8.6 %Mason County: 10.8 %Okanogan County: 19.8 %Pacific County: 11.2 %Pend Oreille County: 8.4 %Pierce County: 8.4 %San Juan County: 11.3 %Skagit County: 10.7 %Skamania County: 8.3 %Snohomish County: 9 %Spokane County: 8.8 %Stevens County: 9.9 %Thurston County: 8.2 %Wahkiakum County: 11.3 %Walla Walla County: 11 %Whatcom County: 10 %Whitman County: 8.5 %Yakima County: 19.8 %
  • Under 8.4
  • 8.4 to 8.9
  • 8.9 to 10
  • 10 to 11
  • 11 to 13
  • 13 and over
%, 2024. 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, 2024

Okanogan County: 19.8 %Okanogan County19.8Yakima County: 19.8 %Yakima County19.8Adams County: 19.6 %Adams County19.6Grant County: 18.6 %Grant County18.6Franklin County: 17.9 %Franklin County17.9Douglas County: 16.1 %Douglas County16.1Chelan County: 13.9 %Chelan County13.9Grays Harbor County: 12 %Grays Harbor County12Klickitat County: 12 %Klickitat County12Benton County: 11.9 %Benton County11.9San Juan County: 11.3 %San Juan County11.3Wahkiakum County: 11.3 %Wahkiakum County11.3Pacific County: 11.2 %Pacific County11.2Clallam County: 11 %Clallam County11Walla Walla County: 11 %Walla Walla County11Mason County: 10.8 %Mason County10.8Skagit County: 10.7 %Skagit County10.7Columbia County: 10.6 %Columbia County10.6Lewis County: 10.6 %Lewis County10.6Ferry County: 10.1 %Ferry County10.1Kittitas County: 10 %Kittitas County10Whatcom County: 10 %Whatcom County10Stevens County: 9.9 %Stevens County9.9Cowlitz County: 9.8 %Cowlitz County9.8Snohomish County: 9 %Snohomish County9Clark County: 8.9 %Clark County8.9Spokane County: 8.8 %Spokane County8.8Lincoln County: 8.6 %Lincoln County8.6Island County: 8.5 %Island County8.5Jefferson County: 8.5 %Jefferson County8.5Whitman County: 8.5 %Whitman County8.5Asotin County: 8.4 %Asotin County8.4Pend Oreille County: 8.4 %Pend Oreille County8.4Pierce County: 8.4 %Pierce County8.4Skamania County: 8.3 %Skamania County8.3Thurston County: 8.2 %Thurston County8.2Garfield County: 8.1 %Garfield County8.1King County: 7.1 %King County7.1Kitsap County: 7.1 %Kitsap County7.1Okanogan County: 19.8 %Okanogan County19.8Yakima County: 19.8 %Yakima County19.8Adams County: 19.6 %Adams County19.6Grant County: 18.6 %Grant County18.6Franklin County: 17.9 %Franklin County17.9Douglas County: 16.1 %Douglas County16.1Chelan County: 13.9 %Chelan County13.9Grays Harbor County: 12 %Grays Harbor County12Klickitat County: 12 %Klickitat County12Benton County: 11.9 %Benton County11.9San Juan County: 11.3 %San Juan County11.3Wahkiakum County: 11.3 %Wahkiakum County11.3Pacific County: 11.2 %Pacific County11.2Clallam County: 11 %Clallam County11Walla Walla County: 11 %Walla Walla County11Mason County: 10.8 %Mason County10.8Skagit County: 10.7 %Skagit County10.7Columbia County: 10.6 %Columbia County10.6Lewis County: 10.6 %Lewis County10.6Ferry County: 10.1 %Ferry County10.1Kittitas County: 10 %Kittitas County10Whatcom County: 10 %Whatcom County10Stevens County: 9.9 %Stevens County9.9Cowlitz County: 9.8 %Cowlitz County9.8Snohomish County: 9 %Snohomish County9Clark County: 8.9 %Clark County8.9Spokane County: 8.8 %Spokane County8.8Lincoln County: 8.6 %Lincoln County8.6Island County: 8.5 %Island County8.5Jefferson County: 8.5 %Jefferson County8.5Whitman County: 8.5 %Whitman County8.5Asotin County: 8.4 %Asotin County8.4Pend Oreille County: 8.4 %Pend Oreille County8.4Pierce County: 8.4 %Pierce County8.4Skamania County: 8.3 %Skamania County8.3Thurston County: 8.2 %Thurston County8.2Garfield County: 8.1 %Garfield County8.1King County: 7.1 %King County7.1Kitsap County: 7.1 %Kitsap 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

RankCounties2024 (%)Change on 2023
1Okanogan County19.80 pts
1Yakima County19.8+0.6 pts
3Adams County19.6+0.7 pts
4Grant County18.6+0.7 pts
5Franklin County17.9+1.1 pts
6Douglas County16.1+0.1 pts
7Chelan County13.9-0.1 pts
8Grays Harbor County12-1 pts
8Klickitat County120 pts
10Benton County11.9+1.5 pts
11San Juan County11.3+1 pts
11Wahkiakum County11.3-0.3 pts
13Pacific County11.2+0.6 pts
14Clallam County11+1.3 pts
14Walla Walla County11+0.1 pts
16Mason County10.8-0.7 pts
17Skagit County10.7-0.2 pts
18Columbia County10.6+1.6 pts
18Lewis County10.6-0.4 pts
20Ferry County10.1-0.5 pts
21Kittitas County10+1.3 pts
21Whatcom County10+1.8 pts
23Stevens County9.9-0.4 pts
24Cowlitz County9.8+0.1 pts
25Snohomish County9+0.6 pts
26Clark County8.9-1 pts
27Spokane County8.8+0.8 pts
28Lincoln County8.6+0.4 pts
29Island County8.5+0.8 pts
29Jefferson County8.5+0.9 pts
29Whitman County8.5-0.2 pts
32Asotin County8.4+0.1 pts
32Pend Oreille County8.4-0.7 pts
32Pierce County8.4-0.1 pts
35Skamania County8.3+0.3 pts
36Thurston County8.2+1.1 pts
37Garfield County8.1-0.7 pts
38King County7.1+0.3 pts
38Kitsap County7.10 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-2024-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), 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-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), 2024. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties. 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), 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties.

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), 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_washington_by_2024,
  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), 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties. 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-2024-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), 2024
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-2024-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties.
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-2024-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 2024, according to the U.S. Census Bureau.

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

Kitsap County, with 7.1% in 2024.

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