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

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 19.47K people in Connecticut with British ancestry (0.54% of Connecticut population). Among all Connecticut counties, Fairfield County had the highest percentage of its population with British ancestry (0.71%), followed by Litchfield County (0.71%), and New London County (0.61%).

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

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

Data Source: US Census Bureau.
Ranking of Connecticut Counties By Percentage of Population with British Ancestry in 2021
Fairfield County
Litchfield County
New London County
Middlesex County
Windham County
Tolland County
Hartford County
New Haven County
Ranking of Connecticut Counties By Percentage of Population with British Ancestry in 2021
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Rank County Percentage of Pop. (%)
1 Fairfield County 0.71
1 Litchfield County 0.71
2 New London County 0.61
3 Middlesex County 0.58
4 Windham County 0.54
5 Tolland County 0.52
6 Hartford County 0.46
7 New Haven County 0.37