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 2017, at 18.8%. Garfield County had the lowest, at 4.9%. The median was 9.7% and the figure for Washington was 8.7%. Source: the U.S. Census Bureau.

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Highest18.8Okanogan County
Lowest4.9Garfield County
Median9.739 counties
Washington8.7History

Map of counties, 2017

Adams County: 18.4 %Asotin County: 7.9 %Benton County: 10 %Chelan County: 11.7 %Clallam County: 10.7 %Clark County: 8.8 %Columbia County: 7.7 %Cowlitz County: 8.3 %Douglas County: 14.9 %Ferry County: 12.2 %Franklin County: 16.7 %Garfield County: 4.9 %Grant County: 17.2 %Grays Harbor County: 10.9 %Island County: 7.1 %Jefferson County: 9.4 %King County: 7.6 %Kitsap County: 6.3 %Kittitas County: 9.6 %Klickitat County: 11.9 %Lewis County: 10.8 %Lincoln County: 8.1 %Mason County: 11.1 %Okanogan County: 18.8 %Pacific County: 11.2 %Pend Oreille County: 9.7 %Pierce County: 8.5 %San Juan County: 9.9 %Skagit County: 10.6 %Skamania County: 8.3 %Snohomish County: 7.6 %Spokane County: 7.4 %Stevens County: 9.6 %Thurston County: 7.4 %Wahkiakum County: 10.2 %Walla Walla County: 9.9 %Whatcom County: 9 %Whitman County: 7.2 %Yakima County: 17.8 %
  • Under 7.6
  • 7.6 to 8.4
  • 8.4 to 9.7
  • 9.7 to 11
  • 11 to 12
  • 12 and over
%, 2017. 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, 2017

Okanogan County: 18.8 %Okanogan County18.8Adams County: 18.4 %Adams County18.4Yakima County: 17.8 %Yakima County17.8Grant County: 17.2 %Grant County17.2Franklin County: 16.7 %Franklin County16.7Douglas County: 14.9 %Douglas County14.9Ferry County: 12.2 %Ferry County12.2Klickitat County: 11.9 %Klickitat County11.9Chelan County: 11.7 %Chelan County11.7Pacific County: 11.2 %Pacific County11.2Mason County: 11.1 %Mason County11.1Grays Harbor County: 10.9 %Grays Harbor County10.9Lewis County: 10.8 %Lewis County10.8Clallam County: 10.7 %Clallam County10.7Skagit County: 10.6 %Skagit County10.6Wahkiakum County: 10.2 %Wahkiakum County10.2Benton County: 10 %Benton County10San Juan County: 9.9 %San Juan County9.9Walla Walla County: 9.9 %Walla Walla County9.9Pend Oreille County: 9.7 %Pend Oreille County9.7Kittitas County: 9.6 %Kittitas County9.6Stevens County: 9.6 %Stevens County9.6Jefferson County: 9.4 %Jefferson County9.4Whatcom County: 9 %Whatcom County9Clark County: 8.8 %Clark County8.8Pierce County: 8.5 %Pierce County8.5Cowlitz County: 8.3 %Cowlitz County8.3Skamania County: 8.3 %Skamania County8.3Lincoln County: 8.1 %Lincoln County8.1Asotin County: 7.9 %Asotin County7.9Columbia County: 7.7 %Columbia County7.7King County: 7.6 %King County7.6Snohomish County: 7.6 %Snohomish County7.6Spokane County: 7.4 %Spokane County7.4Thurston County: 7.4 %Thurston County7.4Whitman County: 7.2 %Whitman County7.2Island County: 7.1 %Island County7.1Kitsap County: 6.3 %Kitsap County6.3Garfield County: 4.9 %Garfield County4.9Okanogan County: 18.8 %Okanogan County18.8Adams County: 18.4 %Adams County18.4Yakima County: 17.8 %Yakima County17.8Grant County: 17.2 %Grant County17.2Franklin County: 16.7 %Franklin County16.7Douglas County: 14.9 %Douglas County14.9Ferry County: 12.2 %Ferry County12.2Klickitat County: 11.9 %Klickitat County11.9Chelan County: 11.7 %Chelan County11.7Pacific County: 11.2 %Pacific County11.2Mason County: 11.1 %Mason County11.1Grays Harbor County: 10.9 %Grays Harbor County10.9Lewis County: 10.8 %Lewis County10.8Clallam County: 10.7 %Clallam County10.7Skagit County: 10.6 %Skagit County10.6Wahkiakum County: 10.2 %Wahkiakum County10.2Benton County: 10 %Benton County10San Juan County: 9.9 %San Juan County9.9Walla Walla County: 9.9 %Walla Walla County9.9Pend Oreille County: 9.7 %Pend Oreille County9.7Kittitas County: 9.6 %Kittitas County9.6Stevens County: 9.6 %Stevens County9.6Jefferson County: 9.4 %Jefferson County9.4Whatcom County: 9 %Whatcom County9Clark County: 8.8 %Clark County8.8Pierce County: 8.5 %Pierce County8.5Cowlitz County: 8.3 %Cowlitz County8.3Skamania County: 8.3 %Skamania County8.3Lincoln County: 8.1 %Lincoln County8.1Asotin County: 7.9 %Asotin County7.9Columbia County: 7.7 %Columbia County7.7King County: 7.6 %King County7.6Snohomish County: 7.6 %Snohomish County7.6Spokane County: 7.4 %Spokane County7.4Thurston County: 7.4 %Thurston County7.4Whitman County: 7.2 %Whitman County7.2Island County: 7.1 %Island County7.1Kitsap County: 6.3 %Kitsap County6.3Garfield County: 4.9 %Garfield County4.9
%. 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

RankCounties2017 (%)Change on 2016
1Okanogan County18.8+1.9 pts
2Adams County18.4+0.3 pts
3Yakima County17.8-0.4 pts
4Grant County17.2+1.7 pts
5Franklin County16.7+0.1 pts
6Douglas County14.9+2.3 pts
7Ferry County12.2-0.7 pts
8Klickitat County11.9+2.1 pts
9Chelan County11.7-0.4 pts
10Pacific County11.2+0.1 pts
11Mason County11.1-0.7 pts
12Grays Harbor County10.9+1.4 pts
13Lewis County10.8+1.3 pts
14Clallam County10.7+0.3 pts
15Skagit County10.6+0.2 pts
16Wahkiakum County10.2+0.9 pts
17Benton County10+0.7 pts
18San Juan County9.9+0.6 pts
18Walla Walla County9.9-0.3 pts
20Pend Oreille County9.7+1.2 pts
21Kittitas County9.6+0.5 pts
21Stevens County9.6+0.3 pts
23Jefferson County9.4+1.1 pts
24Whatcom County9-1.2 pts
25Clark County8.8+0.7 pts
26Pierce County8.5+0.4 pts
27Cowlitz County8.3-0.6 pts
27Skamania County8.3+0.3 pts
29Lincoln County8.1+0.2 pts
30Asotin County7.9-0.1 pts
31Columbia County7.7-0.4 pts
32King County7.6+0.8 pts
32Snohomish County7.6-0.2 pts
34Spokane County7.4-0.4 pts
34Thurston County7.4+0.7 pts
36Whitman County7.2-0.1 pts
37Island County7.1-0.3 pts
38Kitsap County6.3-1.3 pts
39Garfield County4.9-0.5 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-2017-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), 2017) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-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), 2017. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2017. 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), 2017. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2017.

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), 2017 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_washington_by_2017,
  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), 2017}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2017. 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-2017-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), 2017
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-2017-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2017.
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-2017-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 18.8% in 2017, according to the U.S. Census Bureau.

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

Garfield County, with 4.9% in 2017.

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