Data / Rankings / Uninsured rate, all ages (US) / Counties in Washington

Counties in Washington by uninsured rate, all ages (US)

Adams County had the highest uninsured rate, all ages (US) of 39 counties in 2021, at 17.2%. Lincoln County had the lowest, at 3%. The median was 6.4% and the figure for Washington was 6.4%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest17.2Adams County
Lowest3Lincoln County
Median6.439 counties
Washington6.4History

Map of counties, 2021

Adams County: 17.2 %Asotin County: 6.2 %Benton County: 7.6 %Chelan County: 9.7 %Clallam County: 7.3 %Clark County: 6.5 %Columbia County: 7.2 %Cowlitz County: 5.5 %Douglas County: 12.3 %Ferry County: 5.4 %Franklin County: 14.2 %Garfield County: 6.6 %Grant County: 11.7 %Grays Harbor County: 7.2 %Island County: 4.7 %Jefferson County: 5.5 %King County: 5.4 %Kitsap County: 4.7 %Kittitas County: 4.8 %Klickitat County: 7 %Lewis County: 7.2 %Lincoln County: 3 %Mason County: 6.3 %Okanogan County: 10.7 %Pacific County: 5.5 %Pend Oreille County: 6.4 %Pierce County: 6.1 %San Juan County: 7.6 %Skagit County: 6.8 %Skamania County: 5.6 %Snohomish County: 6.1 %Spokane County: 5.3 %Stevens County: 6.9 %Thurston County: 5 %Wahkiakum County: 6.1 %Walla Walla County: 8.2 %Whatcom County: 5.6 %Whitman County: 4.4 %Yakima County: 13.3 %
  • Under 5.3
  • 5.3 to 5.6
  • 5.6 to 6.4
  • 6.4 to 7.2
  • 7.2 to 9.2
  • 9.2 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: 17.2 %Adams County17.2Franklin County: 14.2 %Franklin County14.2Yakima County: 13.3 %Yakima County13.3Douglas County: 12.3 %Douglas County12.3Grant County: 11.7 %Grant County11.7Okanogan County: 10.7 %Okanogan County10.7Chelan County: 9.7 %Chelan County9.7Walla Walla County: 8.2 %Walla Walla County8.2San Juan County: 7.6 %San Juan County7.6Benton County: 7.6 %Benton County7.6Clallam County: 7.3 %Clallam County7.3Columbia County: 7.2 %Columbia County7.2Lewis County: 7.2 %Lewis County7.2Grays Harbor County: 7.2 %Grays Harbor County7.2Klickitat County: 7 %Klickitat County7Stevens County: 6.9 %Stevens County6.9Skagit County: 6.8 %Skagit County6.8Garfield County: 6.6 %Garfield County6.6Clark County: 6.5 %Clark County6.5Pend Oreille County: 6.4 %Pend Oreille County6.4Mason County: 6.3 %Mason County6.3Asotin County: 6.2 %Asotin County6.2Snohomish County: 6.1 %Snohomish County6.1Pierce County: 6.1 %Pierce County6.1Wahkiakum County: 6.1 %Wahkiakum County6.1Whatcom County: 5.6 %Whatcom County5.6Skamania County: 5.6 %Skamania County5.6Pacific County: 5.5 %Pacific County5.5Jefferson County: 5.5 %Jefferson County5.5Cowlitz County: 5.5 %Cowlitz County5.5Ferry County: 5.4 %Ferry County5.4King County: 5.4 %King County5.4Spokane County: 5.3 %Spokane County5.3Thurston County: 5 %Thurston County5Kittitas County: 4.8 %Kittitas County4.8Island County: 4.7 %Island County4.7Kitsap County: 4.7 %Kitsap County4.7Whitman County: 4.4 %Whitman County4.4Lincoln County: 3 %Lincoln County3Adams County: 17.2 %Adams County17.2Franklin County: 14.2 %Franklin County14.2Yakima County: 13.3 %Yakima County13.3Douglas County: 12.3 %Douglas County12.3Grant County: 11.7 %Grant County11.7Okanogan County: 10.7 %Okanogan County10.7Chelan County: 9.7 %Chelan County9.7Walla Walla County: 8.2 %Walla Walla County8.2San Juan County: 7.6 %San Juan County7.6Benton County: 7.6 %Benton County7.6Clallam County: 7.3 %Clallam County7.3Columbia County: 7.2 %Columbia County7.2Lewis County: 7.2 %Lewis County7.2Grays Harbor County: 7.2 %Grays Harbor County7.2Klickitat County: 7 %Klickitat County7Stevens County: 6.9 %Stevens County6.9Skagit County: 6.8 %Skagit County6.8Garfield County: 6.6 %Garfield County6.6Clark County: 6.5 %Clark County6.5Pend Oreille County: 6.4 %Pend Oreille County6.4Mason County: 6.3 %Mason County6.3Asotin County: 6.2 %Asotin County6.2Snohomish County: 6.1 %Snohomish County6.1Pierce County: 6.1 %Pierce County6.1Wahkiakum County: 6.1 %Wahkiakum County6.1Whatcom County: 5.6 %Whatcom County5.6Skamania County: 5.6 %Skamania County5.6Pacific County: 5.5 %Pacific County5.5Jefferson County: 5.5 %Jefferson County5.5Cowlitz County: 5.5 %Cowlitz County5.5Ferry County: 5.4 %Ferry County5.4King County: 5.4 %King County5.4Spokane County: 5.3 %Spokane County5.3Thurston County: 5 %Thurston County5Kittitas County: 4.8 %Kittitas County4.8Island County: 4.7 %Island County4.7Kitsap County: 4.7 %Kitsap County4.7Whitman County: 4.4 %Whitman County4.4Lincoln County: 3 %Lincoln County3
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Adams County17.2
2Franklin County14.2
3Yakima County13.3
4Douglas County12.3
5Grant County11.7
6Okanogan County10.7
7Chelan County9.7
8Walla Walla County8.2
9San Juan County7.6
10Benton County7.6
11Clallam County7.3
12Columbia County7.2
12Lewis County7.2
14Grays Harbor County7.2
15Klickitat County7
16Stevens County6.9
17Skagit County6.8
18Garfield County6.6
19Clark County6.5
20Pend Oreille County6.4
21Mason County6.3
22Asotin County6.2
23Snohomish County6.1
24Pierce County6.1
25Wahkiakum County6.1
26Whatcom County5.6
27Skamania County5.6
28Pacific County5.5
29Jefferson County5.5
30Cowlitz County5.5
31Ferry County5.4
32King County5.4
33Spokane County5.3
34Thurston County5
35Kittitas County4.8
36Island County4.7
36Kitsap County4.7
38Whitman County4.4
39Lincoln County3

Other periods

About this ranking

People without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population. 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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, 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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs (Counties in Washington by uninsured rate, all ages (US), 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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs, Counties in Washington by uninsured rate, all ages (US), 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/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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. Counties in Washington by uninsured rate, all ages (US), 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/washington-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs, Counties in Washington by uninsured rate, all ages (US), 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/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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs: Counties in Washington by uninsured rate, all ages (US), 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/washington-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, 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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs: Counties in Washington by uninsured rate, all ages (US), 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/washington-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate/washington-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, 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, all ages (US)?

Adams County, with 17.2% in 2021, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, all ages (US)?

Lincoln County, with 3% 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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, all ages (US): other rankings

Counties in Washington: more rankings