Ranking of Washington Counties By Percentage of Non-Hispanic White Alone Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent in 2021 (ACS-5Yrs)

Updated on September 5, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the Washington Non-Hispanic White Alone population (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 21.98%. Among all Washington counties, Grays Harbor County had the highest percentage of its Non-Hispanic White Alone population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (35.02%), followed by Ferry County (34.40%), and Stevens County (34.22%).

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 Non-Hispanic White Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Grays Harbor County
Ferry County
Stevens County
Skamania County
Pend Oreille County
Cowlitz County
Mason County
Lewis County
Adams County
Douglas County
Ranking of Washington Counties By Percentage of Non-Hispanic White Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
0 of 0
Rank County Percentage of Population (Aged 25yrs+) (%)
1 Grays Harbor County 35.02
2 Ferry County 34.40
3 Stevens County 34.22
4 Skamania County 32.26
5 Pend Oreille County 31.95
6 Cowlitz County 31.67
7 Mason County 31.06
8 Lewis County 30.95
9 Adams County 30.51
10 Douglas County 30.02
11 Okanogan County 29.63
12 Wahkiakum County 29.61
13 Grant County 29.36
14 Yakima County 29.16
15 Pacific County 28.79
16 Asotin County 28.00
17 Klickitat County 26.85
18 Lincoln County 26.68
19 Kittitas County 26.14
20 Pierce County 26.04
21 Clark County 25.17
22 Skagit County 24.81
23 Chelan County 24.75
24 Franklin County 24.70
25 Clallam County 24.56
26 Snohomish County 24.32
27 Garfield County 23.28
28 Spokane County 22.84
29 Benton County 21.97
30 Columbia County 21.90
31 Island County 21.78
32 Whatcom County 21.60
33 Thurston County 21.10
34 Kitsap County 21.01
35 Walla Walla County 20.79
36 Jefferson County 20.32
37 Whitman County 16.13
38 San Juan County 15.31
39 King County 13.92