Ranking of Connecticut Counties By 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. Among all Connecticut counties, Fairfield County had the highest population with Czech ancestry (3.69K), followed by Hartford County (1.66K), and New Haven County (1.64K).

The chart and table below shows the top 8 counties with high number of people with 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 Population with Czech Ancestry in 2021
Fairfield County
Hartford County
New Haven County
Litchfield County
New London County
Tolland County
Middlesex County
Windham County
Ranking of Connecticut Counties By Population with Czech Ancestry in 2021
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Rank County Population
1 Fairfield County 3690
2 Hartford County 1659
3 New Haven County 1639
4 Litchfield County 867
5 New London County 759
6 Tolland County 719
7 Middlesex County 616
8 Windham County 198