Ranking of Connecticut Counties By Percentage of Population with Unclassified Ancestry in 2021

Based on the US Census ACS-5Yrs estimates, in 2021, there were 596.88K people in Connecticut with Unclassified ancestry (16.56% of Connecticut population). Among all Connecticut counties, Tolland County had the highest percentage of its population with Unclassified ancestry (25.29%), followed by Windham County (22.71%), and Litchfield County (20.04%).

The chart and table below shows the top 8 counties with high percentage of its population having Unclassified ancestry.

You can see similar information for other states and for other ancestry groups in Connecticut.