Ranking of Massachusetts Counties By Population with American Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 260.36K people in Massachusetts with American ancestry. Among all Massachusetts counties, Middlesex County had the highest population with American ancestry (53.34K), followed by Worcester County (50.36K), and Norfolk County (28.09K).

The chart and table below shows the top 10 counties with high number of people with American 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 American Ancestry in 2021
Middlesex County
Worcester County
Norfolk County
Hampden County
Plymouth County
Essex County
Suffolk County
Bristol County
Barnstable County
Hampshire County
Ranking of Massachusetts Counties By Population with American Ancestry in 2021
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Rank County Population
1 Middlesex County 53342
2 Worcester County 50364
3 Norfolk County 28090
4 Hampden County 23635
5 Plymouth County 22565
6 Essex County 21733
7 Suffolk County 17602
8 Bristol County 16257
9 Barnstable County 9477
10 Hampshire County 7674
11 Berkshire County 5645
12 Franklin County 2826
13 Dukes County 687
14 Nantucket County 467