Ranking of Washington Counties By Percentage of American Indian and Alaska Native Alone Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)

Updated on September 5, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the Washington American Indian and Alaska Native Alone population (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 16.82%. Among all Washington counties, Adams County had the highest percentage of its American Indian and Alaska Native Alone population (aged 25 years and above) with an educational attainment of Less than High School Diploma (81.87%), followed by Franklin County (45.78%), and Walla Walla County (33.29%).

The chart below shows the top 10 Washington counties, and the table below shows the ranking of all Washington counties.

You can see similar information for other educational attainments, and for other races and ethnicities.

You can also see similar information for other states and for the United States.

Ranking of Washington Counties By Percentage of American Indian and Alaska Native Alone Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
Adams County
Franklin County
Walla Walla County
Chelan County
Yakima County
Douglas County
Pend Oreille County
Pacific County
Columbia County
Skamania County
Ranking of Washington Counties By Percentage of American Indian and Alaska Native Alone Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
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Rank County Percentage of Population (Aged 25yrs+) (%)
1 Adams County 81.87
2 Franklin County 45.78
3 Walla Walla County 33.29
4 Chelan County 26.44
5 Yakima County 24.69
6 Douglas County 24.66
7 Pend Oreille County 23.83
8 Pacific County 23.44
9 Columbia County 22.22
10 Skamania County 20.21
11 Lewis County 19.33
12 Cowlitz County 18.95
13 Grays Harbor County 18.43
14 Grant County 17.51
15 Clallam County 17.01
16 Jefferson County 16.91
17 King County 15.92
18 Mason County 15.91
19 Island County 15.61
20 Spokane County 15.34
21 Lincoln County 15.25
22 Pierce County 14.83
23 Snohomish County 14.78
24 Whatcom County 14.54
25 Okanogan County 14.07
26 Kitsap County 13.95
27 Stevens County 13.89
28 Clark County 13.42
29 Ferry County 13.19
30 Thurston County 12.78
31 Wahkiakum County 12.50
32 Skagit County 11.78
33 Benton County 10.75
34 Whitman County 7.78
35 Klickitat County 4.98
36 San Juan County 4.95
37 Asotin County 0.00
37 Kittitas County 0.00