Ranking of Massachusetts Counties By Percentage of 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 percentage of the population of Massachusetts (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 8.84%. Among all Massachusetts counties, Bristol County had the highest percentage of its population (aged 25 years and above) with an educational attainment of Less than High School Diploma (14.17%), followed by Hampden County (13.87%), and Suffolk County (12.99%).
The chart below shows the top 10 Massachusetts counties, and the table below shows the ranking of all Massachusetts 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: Massachusetts ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Massachusetts Counties By Percentage of 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 | Bristol County | 14.17 |
| 2 | Hampden County | 13.87 |
| 3 | Suffolk County | 12.99 |
| 4 | Essex County | 10.26 |
| 5 | Worcester County | 8.44 |
| 6 | Plymouth County | 7.00 |
| 7 | Berkshire County | 6.96 |
| 8 | Middlesex County | 6.43 |
| 9 | Franklin County | 6.40 |
| 10 | Norfolk County | 5.81 |
| 11 | Hampshire County | 4.74 |
| 12 | Barnstable County | 4.32 |
| 13 | Dukes County | 4.19 |
| 14 | Nantucket County | 3.80 |