Ranking of Massachusetts Counties By Percentage of 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 percentage of the population of Massachusetts (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 23.19%. Among all Massachusetts counties, Hampden County had the highest percentage of its population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (30.37%), followed by Bristol County (30.15%), and Berkshire County (29.20%).

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.

Ranking of Massachusetts Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Hampden County
Bristol County
Berkshire County
Franklin County
Worcester County
Plymouth County
Dukes County
Essex County
Barnstable County
Hampshire County
Ranking of Massachusetts Counties By Percentage of 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 Hampden County 30.37
2 Bristol County 30.15
3 Berkshire County 29.20
4 Franklin County 27.96
5 Worcester County 26.86
6 Plymouth County 26.75
7 Dukes County 25.36
8 Essex County 24.38
9 Barnstable County 22.25
10 Hampshire County 21.58
11 Suffolk County 20.83
12 Nantucket County 18.24
13 Norfolk County 18.09
14 Middlesex County 18.07