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)

Yakima County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 39 counties in 2015, at 20.9%. Garfield County had the lowest, at 6.5%. The median was 10.3% and the figure for Washington was 9.4%. Source: the U.S. Census Bureau.

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Highest20.9Yakima County
Lowest6.5Garfield County
Median10.339 counties
Washington9.4History

Map of counties, 2015

Adams County: 20.3 %Asotin County: 8.6 %Benton County: 9.4 %Chelan County: 12 %Clallam County: 11.3 %Clark County: 8.8 %Columbia County: 8.8 %Cowlitz County: 10 %Douglas County: 14.4 %Ferry County: 13.8 %Franklin County: 17.8 %Garfield County: 6.5 %Grant County: 18.6 %Grays Harbor County: 12.6 %Island County: 7.3 %Jefferson County: 8.4 %King County: 7.8 %Kitsap County: 6.8 %Kittitas County: 10.4 %Klickitat County: 11.4 %Lewis County: 11.2 %Lincoln County: 8.2 %Mason County: 12.8 %Okanogan County: 18 %Pacific County: 12.1 %Pend Oreille County: 9 %Pierce County: 9.2 %San Juan County: 11.5 %Skagit County: 12.2 %Skamania County: 7.9 %Snohomish County: 8.6 %Spokane County: 7.8 %Stevens County: 10.3 %Thurston County: 8 %Wahkiakum County: 9.5 %Walla Walla County: 11.2 %Whatcom County: 10.7 %Whitman County: 6.8 %Yakima County: 20.9 %
  • Under 7.9
  • 7.9 to 8.8
  • 8.8 to 10
  • 10 to 11
  • 11 to 13
  • 13 and over
%, 2015. 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, 2015

Yakima County: 20.9 %Yakima County20.9Adams County: 20.3 %Adams County20.3Grant County: 18.6 %Grant County18.6Okanogan County: 18 %Okanogan County18Franklin County: 17.8 %Franklin County17.8Douglas County: 14.4 %Douglas County14.4Ferry County: 13.8 %Ferry County13.8Mason County: 12.8 %Mason County12.8Grays Harbor County: 12.6 %Grays Harbor County12.6Skagit County: 12.2 %Skagit County12.2Pacific County: 12.1 %Pacific County12.1Chelan County: 12 %Chelan County12San Juan County: 11.5 %San Juan County11.5Klickitat County: 11.4 %Klickitat County11.4Clallam County: 11.3 %Clallam County11.3Lewis County: 11.2 %Lewis County11.2Walla Walla County: 11.2 %Walla Walla County11.2Whatcom County: 10.7 %Whatcom County10.7Kittitas County: 10.4 %Kittitas County10.4Stevens County: 10.3 %Stevens County10.3Cowlitz County: 10 %Cowlitz County10Wahkiakum County: 9.5 %Wahkiakum County9.5Benton County: 9.4 %Benton County9.4Pierce County: 9.2 %Pierce County9.2Pend Oreille County: 9 %Pend Oreille County9Clark County: 8.8 %Clark County8.8Columbia County: 8.8 %Columbia County8.8Asotin County: 8.6 %Asotin County8.6Snohomish County: 8.6 %Snohomish County8.6Jefferson County: 8.4 %Jefferson County8.4Lincoln County: 8.2 %Lincoln County8.2Thurston County: 8 %Thurston County8Skamania County: 7.9 %Skamania County7.9King County: 7.8 %King County7.8Spokane County: 7.8 %Spokane County7.8Island County: 7.3 %Island County7.3Kitsap County: 6.8 %Kitsap County6.8Whitman County: 6.8 %Whitman County6.8Garfield County: 6.5 %Garfield County6.5Yakima County: 20.9 %Yakima County20.9Adams County: 20.3 %Adams County20.3Grant County: 18.6 %Grant County18.6Okanogan County: 18 %Okanogan County18Franklin County: 17.8 %Franklin County17.8Douglas County: 14.4 %Douglas County14.4Ferry County: 13.8 %Ferry County13.8Mason County: 12.8 %Mason County12.8Grays Harbor County: 12.6 %Grays Harbor County12.6Skagit County: 12.2 %Skagit County12.2Pacific County: 12.1 %Pacific County12.1Chelan County: 12 %Chelan County12San Juan County: 11.5 %San Juan County11.5Klickitat County: 11.4 %Klickitat County11.4Clallam County: 11.3 %Clallam County11.3Lewis County: 11.2 %Lewis County11.2Walla Walla County: 11.2 %Walla Walla County11.2Whatcom County: 10.7 %Whatcom County10.7Kittitas County: 10.4 %Kittitas County10.4Stevens County: 10.3 %Stevens County10.3Cowlitz County: 10 %Cowlitz County10Wahkiakum County: 9.5 %Wahkiakum County9.5Benton County: 9.4 %Benton County9.4Pierce County: 9.2 %Pierce County9.2Pend Oreille County: 9 %Pend Oreille County9Clark County: 8.8 %Clark County8.8Columbia County: 8.8 %Columbia County8.8Asotin County: 8.6 %Asotin County8.6Snohomish County: 8.6 %Snohomish County8.6Jefferson County: 8.4 %Jefferson County8.4Lincoln County: 8.2 %Lincoln County8.2Thurston County: 8 %Thurston County8Skamania County: 7.9 %Skamania County7.9King County: 7.8 %King County7.8Spokane County: 7.8 %Spokane County7.8Island County: 7.3 %Island County7.3Kitsap County: 6.8 %Kitsap County6.8Whitman County: 6.8 %Whitman County6.8Garfield County: 6.5 %Garfield County6.5
%. 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

RankCounties2015 (%)Change on 2014
1Yakima County20.9-3.6 pts
2Adams County20.3-4 pts
3Grant County18.6-2.6 pts
4Okanogan County18-4.7 pts
5Franklin County17.8-6 pts
6Douglas County14.4-5.9 pts
7Ferry County13.8-5 pts
8Mason County12.8-2.9 pts
9Grays Harbor County12.6-4.6 pts
10Skagit County12.2-4.2 pts
11Pacific County12.1-4.8 pts
12Chelan County12-4.5 pts
13San Juan County11.5-4.2 pts
14Klickitat County11.4-6.1 pts
15Clallam County11.3-4 pts
16Lewis County11.2-4.3 pts
16Walla Walla County11.2-5.3 pts
18Whatcom County10.7-3 pts
19Kittitas County10.4-3.7 pts
20Stevens County10.3-5.3 pts
21Cowlitz County10-3.8 pts
22Wahkiakum County9.5-4.1 pts
23Benton County9.4-4.4 pts
24Pierce County9.2-4 pts
25Pend Oreille County9-4.9 pts
26Clark County8.8-3.9 pts
26Columbia County8.8-4.8 pts
28Asotin County8.6-4.1 pts
28Snohomish County8.6-2.9 pts
30Jefferson County8.4-3.6 pts
31Lincoln County8.2-3.7 pts
32Thurston County8-3.4 pts
33Skamania County7.9-3.7 pts
34King County7.8-2.4 pts
34Spokane County7.8-3.9 pts
36Island County7.3-4.4 pts
37Kitsap County6.8-3 pts
37Whitman County6.8-3.7 pts
39Garfield County6.5-3.3 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-2015-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), 2015) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-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), 2015. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2015. 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), 2015. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2015.

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), 2015 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_washington_by_2015,
  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), 2015}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2015. 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-2015-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), 2015
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-2015-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/washington-counties?period=2015.
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-2015-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)?

Yakima County, with 20.9% in 2015, 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 6.5% in 2015.

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