Ranking of Maine Counties By Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent 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 High School Graduate or Equivalent was 307,382. Among all Maine counties, York County had the highest population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (46,592), followed by Cumberland County (44,666), and Penobscot County (35,630).
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.
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Related Topics: Maine ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Maine Counties By Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | York County | 46592 |
| 2 | Cumberland County | 44666 |
| 3 | Penobscot County | 35630 |
| 4 | Kennebec County | 30621 |
| 5 | Androscoggin County | 27322 |
| 6 | Aroostook County | 18973 |
| 7 | Oxford County | 17591 |
| 8 | Somerset County | 15546 |
| 9 | Hancock County | 13222 |
| 10 | Knox County | 9759 |
| 11 | Waldo County | 9530 |
| 12 | Lincoln County | 8609 |
| 13 | Washington County | 8588 |
| 14 | Sagadahoc County | 7851 |
| 15 | Franklin County | 7839 |
| 16 | Piscataquis County | 5043 |