Ranking of Arizona 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 Arizona American Indian and Alaska Native Alone population (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 21.26%. Among all Arizona counties, Yuma 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 (34.58%), followed by Gila County (27.45%), and Pinal County (26.93%).

The chart below shows the top 10 Arizona counties, and the table below shows the ranking of all Arizona 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 Arizona 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
Yuma County
Gila County
Pinal County
Pima County
Graham County
Navajo County
Yavapai County
Apache County
Coconino County
Cochise County
Ranking of Arizona 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 Yuma County 34.58
2 Gila County 27.45
3 Pinal County 26.93
4 Pima County 25.50
5 Graham County 23.99
6 Navajo County 23.55
7 Yavapai County 22.43
8 Apache County 20.69
9 Coconino County 19.57
10 Cochise County 19.35
11 La Paz County 17.59
12 Maricopa County 17.00
13 Mohave County 15.80
14 Greenlee County 13.39
15 Santa Cruz County 13.18