Ranking of Maine Counties By Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)

Updated on September 3, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the population of Maine (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 62,607. Among all Maine counties, Cumberland County had the highest population (aged 25 years and above) with an educational attainment of Less than High School Diploma (9,503), followed by York County (8,758), and Penobscot County (7,008).

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.

You can also see similar information for other states and for the United States.

Ranking of Maine Counties By Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
Cumberland County
York County
Penobscot County
Androscoggin County
Kennebec County
Aroostook County
Oxford County
Somerset County
Waldo County
Hancock County
Ranking of Maine Counties By Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
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Rank County Number of People
1 Cumberland County 9503
2 York County 8758
3 Penobscot County 7008
4 Androscoggin County 6308
5 Kennebec County 5529
6 Aroostook County 4805
7 Oxford County 3551
8 Somerset County 3375
9 Waldo County 2043
10 Hancock County 2025
11 Washington County 2010
12 Knox County 1976
13 Lincoln County 1636
14 Sagadahoc County 1623
15 Franklin County 1344
16 Piscataquis County 1113