Ranking of Connecticut Counties By White Alone Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent 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 High School Graduate or Equivalent was 478,197. Among all Connecticut counties, New Haven County had the highest White Alone population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (126,834), followed by Hartford County (108,564), and Fairfield County (86,266).

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 High School Graduate or Equivalent in 2021
New Haven County
Hartford County
Fairfield County
New London County
Litchfield County
Middlesex County
Windham County
Tolland County
Ranking of Connecticut Counties By White Alone 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 New Haven County 126834
2 Hartford County 108564
3 Fairfield County 86266
4 New London County 43658
5 Litchfield County 38048
6 Middlesex County 26411
7 Windham County 25671
8 Tolland County 22745