Ranking of Maine Counties By Percentage of American Indian and Alaska Native 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 Maine American Indian and Alaska Native Alone population (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 33.98%. Among all Maine counties, Piscataquis County had the highest percentage of its American Indian and Alaska Native Alone population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (100.00%), followed by Oxford County (77.98%), and Waldo County (76.92%).

The chart below shows the top 10 Maine counties, and the table below shows the ranking of all Maine 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 Maine Counties By Percentage of American Indian and Alaska Native Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Piscataquis County
Oxford County
Waldo County
Knox County
Somerset County
Penobscot County
Washington County
York County
Aroostook County
Lincoln County
Ranking of Maine Counties By Percentage of American Indian and Alaska Native 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 Piscataquis County 100.00
2 Oxford County 77.98
3 Waldo County 76.92
4 Knox County 55.26
5 Somerset County 44.55
6 Penobscot County 38.79
7 Washington County 36.71
8 York County 30.97
9 Aroostook County 30.37
10 Lincoln County 26.79
11 Cumberland County 23.69
12 Kennebec County 21.78
13 Hancock County 16.76
14 Androscoggin County 8.33
15 Franklin County 0.00
15 Sagadahoc County 0.00