Ranking of Idaho 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 Idaho Non-Hispanic White Alone population (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 26.46%. Among all Idaho counties, Franklin 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 (44.74%), followed by Oneida County (38.45%), and Boundary County (38.33%).

The chart below shows the top 10 Idaho counties, and the table below shows the ranking of all Idaho 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 Idaho Counties By Percentage of Non-Hispanic White Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Franklin County
Oneida County
Boundary County
Payette County
Bear Lake County
Gooding County
Gem County
Lincoln County
Shoshone County
Clearwater County
Ranking of Idaho Counties By Percentage of Non-Hispanic White Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
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Rank County Percentage of Population (Aged 25yrs+) (%)
1 Franklin County 44.74
2 Oneida County 38.45
3 Boundary County 38.33
4 Payette County 38.25
5 Bear Lake County 37.69
6 Gooding County 37.39
7 Gem County 37.31
8 Lincoln County 36.99
9 Shoshone County 36.81
10 Clearwater County 36.08
11 Benewah County 35.72
12 Adams County 35.71
13 Butte County 35.12
14 Clark County 35.02
15 Minidoka County 34.89
16 Owyhee County 34.55
17 Bingham County 34.39
18 Power County 34.06
19 Idaho County 33.55
20 Jerome County 32.10
21 Washington County 31.17
22 Lemhi County 30.89
23 Nez Perce County 30.78
24 Canyon County 30.57
25 Boise County 30.18
26 Fremont County 29.95
27 Elmore County 29.76
28 Custer County 29.63
29 Bonner County 28.89
30 Cassia County 28.56
31 Caribou County 28.29
32 Lewis County 27.80
33 Twin Falls County 27.38
34 Kootenai County 27.09
35 Valley County 26.17
36 Bannock County 25.65
37 Camas County 24.85
38 Bonneville County 24.16
39 Jefferson County 23.36
40 Ada County 20.70
41 Latah County 20.18
42 Blaine County 20.16
43 Teton County 17.59
44 Madison County 17.40