Ranking of Connecticut Counties By Percentage of Two Or More Races Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)

Updated on September 5, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the Connecticut Two Or More Races population (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 14.82%. Among all Connecticut counties, Hartford County had the highest percentage of its Two Or More Races population (aged 25 years and above) with an educational attainment of Less than High School Diploma (17.31%), followed by Windham County (15.95%), and New Haven County (15.45%).

The chart below shows the top 8 Connecticut counties, and the table below shows the ranking of all Connecticut 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 Connecticut Counties By Percentage of Two Or More Races Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
Hartford County
Windham County
New Haven County
Fairfield County
Middlesex County
Litchfield County
New London County
Tolland County
Ranking of Connecticut Counties By Percentage of Two Or More Races 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 Hartford County 17.31
2 Windham County 15.95
3 New Haven County 15.45
4 Fairfield County 14.40
5 Middlesex County 11.79
6 Litchfield County 11.12
7 New London County 11.01
8 Tolland County 5.91