Ranking of Massachusetts Counties By Population with Unclassified Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 1.30M people in Massachusetts with Unclassified ancestry. Among all Massachusetts counties, Middlesex County had the highest population with Unclassified ancestry (297.92K), followed by Worcester County (158.54K), and Suffolk County (153.47K).
The chart and table below shows the top 10 counties with high number of people with Unclassified ancestry.
You can see similar information for other states and for other ancestry groups in Massachusetts.
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Related Topics: Massachusetts ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of Massachusetts Counties By Population with Unclassified Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Middlesex County | 297917 |
| 2 | Worcester County | 158541 |
| 3 | Suffolk County | 153473 |
| 4 | Essex County | 145181 |
| 5 | Norfolk County | 130662 |
| 6 | Bristol County | 101980 |
| 7 | Plymouth County | 93668 |
| 8 | Hampden County | 84714 |
| 9 | Barnstable County | 42093 |
| 10 | Hampshire County | 35951 |
| 11 | Berkshire County | 28838 |
| 12 | Franklin County | 13987 |
| 13 | Nantucket County | 4028 |
| 14 | Dukes County | 3829 |
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