Ranking of Massachusetts 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 1.45K people in Massachusetts with Celtic ancestry. Among all Massachusetts counties, Worcester County had the highest population with Celtic ancestry (369), followed by Middlesex County (346), and Essex County (190).

The chart and table below shows the top 10 counties with high number of people with Celtic ancestry.

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

Data Source: US Census Bureau.
Ranking of Massachusetts Counties By Population with Celtic Ancestry in 2021
Worcester County
Middlesex County
Essex County
Norfolk County
Barnstable County
Plymouth County
Suffolk County
Franklin County
Hampshire County
Bristol County
Ranking of Massachusetts Counties By Population with Celtic Ancestry in 2021
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Rank County Population
1 Worcester County 369
2 Middlesex County 346
3 Essex County 190
4 Norfolk County 154
5 Barnstable County 124
6 Plymouth County 89
7 Suffolk County 58
8 Franklin County 40
9 Hampshire County 29
10 Bristol County 20
11 Hampden County 15
12 Nantucket County 7
13 Berkshire County 5