Ranking of Connecticut Counties By Percentage of Population Aged 25 years and above with an Educational attainment of Some College or Associates Degree 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 Connecticut (aged 25 years and above) who had an educational attainment of Some College or Associates Degree was 24.38%. Among all Connecticut counties, Windham County had the highest percentage of its population (aged 25 years and above) with an educational attainment of Some College or Associates Degree (30.09%), followed by New London County (29.88%), and Litchfield County (28.22%).

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.

You can also see similar information for other states and for the United States.

Ranking of Connecticut Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of Some College or Associates Degree in 2021
Windham County
New London County
Litchfield County
Middlesex County
Tolland County
Hartford County
New Haven County
Fairfield County
Ranking of Connecticut Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of Some College or Associates Degree in 2021
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Rank County Percentage of Population (Aged 25yrs+) (%)
1 Windham County 30.09
2 New London County 29.88
3 Litchfield County 28.22
4 Middlesex County 26.21
5 Tolland County 25.88
6 Hartford County 25.25
7 New Haven County 24.08
8 Fairfield County 20.15