Ranking of Connecticut Counties By Population with Celtic Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 499 people in Connecticut with Celtic ancestry. Among all Connecticut counties, Fairfield County had the highest population with Celtic ancestry (148), followed by Hartford County (104), and Litchfield County (81).

The chart and table below shows the top 8 counties with high number of people with Celtic 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 Celtic Ancestry in 2021
Fairfield County
Hartford County
Litchfield County
New London County
New Haven County
Windham County
Middlesex County
Tolland County
Ranking of Connecticut Counties By Population with Celtic Ancestry in 2021
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Rank County Population
1 Fairfield County 148
2 Hartford County 104
3 Litchfield County 81
4 New London County 78
5 New Haven County 40
6 Windham County 23
7 Middlesex County 15
8 Tolland County 10