Ranking of Connecticut Counties By White Alone 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 Connecticut White Alone population (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 122,703. Among all Connecticut counties, New Haven County had the highest White Alone population (aged 25 years and above) with an educational attainment of Less than High School Diploma (32,399), followed by Hartford County (31,345), and Fairfield County (28,344).

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 White Alone Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
New Haven County
Hartford County
Fairfield County
New London County
Litchfield County
Windham County
Middlesex County
Tolland County
Ranking of Connecticut Counties By White Alone 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 New Haven County 32399
2 Hartford County 31345
3 Fairfield County 28344
4 New London County 8571
5 Litchfield County 7256
6 Windham County 6668
7 Middlesex County 4445
8 Tolland County 3675