Ranking of Connecticut Counties By Percentage of Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent in 2021 (ACS-5Yrs)
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 High School Graduate or Equivalent was 26.12%. Among all Connecticut counties, Windham County had the highest percentage of its population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (34.93%), followed by New Haven County (29.60%), and Litchfield County (29.48%).
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.
| Rank | County | Percentage of Population (Aged 25yrs+) (%) |
|---|---|---|
| 1 | Windham County | 34.93 |
| 2 | New Haven County | 29.60 |
| 3 | Litchfield County | 29.48 |
| 4 | New London County | 28.60 |
| 5 | Tolland County | 26.13 |
| 6 | Hartford County | 25.83 |
| 7 | Middlesex County | 25.15 |
| 8 | Fairfield County | 20.83 |
