Data / Rankings / Uninsured rate, ages 35 to 64 (US, ACS) / Counties in Washington

Counties in Washington by uninsured rate, ages 35 to 64 (US, ACS)

Adams County had the highest uninsured rate, ages 35 to 64 (US, ACS) of 39 counties in 2021, at 25.5%. Kittitas County had the lowest, at 5.1%. The median was 7.8% and the figure for Washington was 8%. Source: the U.S. Census Bureau.

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Highest25.5Adams County
Lowest5.1Kittitas County
Median7.839 counties
Washington8History

Map of counties, 2021

Adams County: 25.5 %Asotin County: 7.7 %Benton County: 9.8 %Chelan County: 14.7 %Clallam County: 10.1 %Clark County: 7.8 %Columbia County: 14 %Cowlitz County: 7.6 %Douglas County: 18.3 %Ferry County: 8.7 %Franklin County: 20.8 %Garfield County: 10.7 %Grant County: 18.1 %Grays Harbor County: 11.8 %Island County: 6.7 %Jefferson County: 7.8 %King County: 6.4 %Kitsap County: 5.4 %Kittitas County: 5.1 %Klickitat County: 10 %Lewis County: 10.2 %Lincoln County: 5.1 %Mason County: 7.8 %Okanogan County: 15.7 %Pacific County: 6.6 %Pend Oreille County: 6.1 %Pierce County: 7.5 %San Juan County: 11.4 %Skagit County: 9.3 %Skamania County: 6.7 %Snohomish County: 7.4 %Spokane County: 6.6 %Stevens County: 8.8 %Thurston County: 6.4 %Wahkiakum County: 6.9 %Walla Walla County: 11.4 %Whatcom County: 6.5 %Whitman County: 5.7 %Yakima County: 20.5 %
  • Under 6.4
  • 6.4 to 7.2
  • 7.2 to 7.8
  • 7.8 to 10
  • 10 to 14
  • 14 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Adams County: 25.5 %Adams County25.5Franklin County: 20.8 %Franklin County20.8Yakima County: 20.5 %Yakima County20.5Douglas County: 18.3 %Douglas County18.3Grant County: 18.1 %Grant County18.1Okanogan County: 15.7 %Okanogan County15.7Chelan County: 14.7 %Chelan County14.7Columbia County: 14 %Columbia County14Grays Harbor County: 11.8 %Grays Harbor County11.8San Juan County: 11.4 %San Juan County11.4Walla Walla County: 11.4 %Walla Walla County11.4Garfield County: 10.7 %Garfield County10.7Lewis County: 10.2 %Lewis County10.2Clallam County: 10.1 %Clallam County10.1Klickitat County: 10 %Klickitat County10Benton County: 9.8 %Benton County9.8Skagit County: 9.3 %Skagit County9.3Stevens County: 8.8 %Stevens County8.8Ferry County: 8.7 %Ferry County8.7Mason County: 7.8 %Mason County7.8Jefferson County: 7.8 %Jefferson County7.8Clark County: 7.8 %Clark County7.8Asotin County: 7.7 %Asotin County7.7Cowlitz County: 7.6 %Cowlitz County7.6Pierce County: 7.5 %Pierce County7.5Snohomish County: 7.4 %Snohomish County7.4Wahkiakum County: 6.9 %Wahkiakum County6.9Island County: 6.7 %Island County6.7Skamania County: 6.7 %Skamania County6.7Pacific County: 6.6 %Pacific County6.6Spokane County: 6.6 %Spokane County6.6Whatcom County: 6.5 %Whatcom County6.5King County: 6.4 %King County6.4Thurston County: 6.4 %Thurston County6.4Pend Oreille County: 6.1 %Pend Oreille County6.1Whitman County: 5.7 %Whitman County5.7Kitsap County: 5.4 %Kitsap County5.4Lincoln County: 5.1 %Lincoln County5.1Kittitas County: 5.1 %Kittitas County5.1Adams County: 25.5 %Adams County25.5Franklin County: 20.8 %Franklin County20.8Yakima County: 20.5 %Yakima County20.5Douglas County: 18.3 %Douglas County18.3Grant County: 18.1 %Grant County18.1Okanogan County: 15.7 %Okanogan County15.7Chelan County: 14.7 %Chelan County14.7Columbia County: 14 %Columbia County14Grays Harbor County: 11.8 %Grays Harbor County11.8San Juan County: 11.4 %San Juan County11.4Walla Walla County: 11.4 %Walla Walla County11.4Garfield County: 10.7 %Garfield County10.7Lewis County: 10.2 %Lewis County10.2Clallam County: 10.1 %Clallam County10.1Klickitat County: 10 %Klickitat County10Benton County: 9.8 %Benton County9.8Skagit County: 9.3 %Skagit County9.3Stevens County: 8.8 %Stevens County8.8Ferry County: 8.7 %Ferry County8.7Mason County: 7.8 %Mason County7.8Jefferson County: 7.8 %Jefferson County7.8Clark County: 7.8 %Clark County7.8Asotin County: 7.7 %Asotin County7.7Cowlitz County: 7.6 %Cowlitz County7.6Pierce County: 7.5 %Pierce County7.5Snohomish County: 7.4 %Snohomish County7.4Wahkiakum County: 6.9 %Wahkiakum County6.9Island County: 6.7 %Island County6.7Skamania County: 6.7 %Skamania County6.7Pacific County: 6.6 %Pacific County6.6Spokane County: 6.6 %Spokane County6.6Whatcom County: 6.5 %Whatcom County6.5King County: 6.4 %King County6.4Thurston County: 6.4 %Thurston County6.4Pend Oreille County: 6.1 %Pend Oreille County6.1Whitman County: 5.7 %Whitman County5.7Kitsap County: 5.4 %Kitsap County5.4Lincoln County: 5.1 %Lincoln County5.1Kittitas County: 5.1 %Kittitas County5.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Adams County25.5
2Franklin County20.8
3Yakima County20.5
4Douglas County18.3
5Grant County18.1
6Okanogan County15.7
7Chelan County14.7
8Columbia County14
9Grays Harbor County11.8
10San Juan County11.4
11Walla Walla County11.4
12Garfield County10.7
13Lewis County10.2
14Clallam County10.1
15Klickitat County10
16Benton County9.8
17Skagit County9.3
18Stevens County8.8
19Ferry County8.7
20Mason County7.8
21Jefferson County7.8
22Clark County7.8
23Asotin County7.7
24Cowlitz County7.6
25Pierce County7.5
26Snohomish County7.4
27Wahkiakum County6.9
28Island County6.7
29Skamania County6.7
30Pacific County6.6
31Spokane County6.6
32Whatcom County6.5
33King County6.4
34Thurston County6.4
35Pend Oreille County6.1
36Whitman County5.7
37Kitsap County5.4
38Lincoln County5.1
39Kittitas County5.1

Other periods

About this ranking

People aged 35 to 64 without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population aged 35 to 64. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Coverage is what people reported at the interview, so the five-year figure averages five years of answers. People whose only coverage is the Indian Health Service count as uninsured. Active-duty military and people living in institutions are outside the universe. For single-year model-based county figures under 65, see uninsured_rate_under_65, uninsured_rate_18_64 and uninsured_rate_under_19 (SAHIE), a different source.

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. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. 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). American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs (Counties in Washington by uninsured rate, ages 35 to 64 (US, ACS), 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat

MLA 9

American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in Washington by uninsured rate, ages 35 to 64 (US, ACS), 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/washington-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Counties in Washington by uninsured rate, ages 35 to 64 (US, ACS), 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/washington-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in Washington by uninsured rate, ages 35 to 64 (US, ACS), 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-35-64/washington-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_washington_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in Washington by uninsured rate, ages 35 to 64 (US, ACS), 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/washington-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in Washington by uninsured rate, ages 35 to 64 (US, ACS), 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat
L2  - https://invokely.ai/rankings/uninsured-rate-ages-35-64/washington-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/washington-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest uninsured rate, ages 35 to 64 (US, ACS)?

Adams County, with 25.5% in 2021, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 35 to 64 (US, ACS)?

Kittitas County, with 5.1% 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, American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, ages 35 to 64 (US, ACS): other rankings

Counties in Washington: more rankings