Ranking of Maine Counties By Percentage of 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 Maine White Alone population (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 31.15%. Among all Maine counties, Somerset County had the highest percentage of its White Alone population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (41.12%), followed by Oxford County (40.14%), and Piscataquis County (39.18%).

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 White Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Somerset County
Oxford County
Piscataquis County
Aroostook County
Washington County
Franklin County
Androscoggin County
Kennebec County
Penobscot County
Lincoln County
Ranking of Maine Counties By Percentage of 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 Somerset County 41.12
2 Oxford County 40.14
3 Piscataquis County 39.18
4 Aroostook County 38.51
5 Washington County 37.76
6 Franklin County 36.74
7 Androscoggin County 35.88
8 Kennebec County 34.77
9 Penobscot County 33.25
10 Lincoln County 32.61
11 Waldo County 32.48
12 Hancock County 31.72
13 Knox County 31.42
14 York County 29.76
15 Sagadahoc County 28.94
16 Cumberland County 20.45