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

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 10.15K people in Connecticut with Czech ancestry (0.28% of Connecticut population). Among all Connecticut counties, Tolland County had the highest percentage of its population with Czech ancestry (0.48%), followed by Litchfield County (0.47%), and Fairfield County (0.39%).

The chart and table below shows the top 8 counties with high percentage of its population having Czech 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 Czech Ancestry in 2021
Tolland County
Litchfield County
Fairfield County
Middlesex County
New London County
Hartford County
New Haven County
Windham County
Ranking of Connecticut Counties By Percentage of Population with Czech Ancestry in 2021
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Rank County Percentage of Pop. (%)
1 Tolland County 0.48
2 Litchfield County 0.47
3 Fairfield County 0.39
4 Middlesex County 0.37
5 New London County 0.28
6 Hartford County 0.19
6 New Haven County 0.19
7 Windham County 0.17