Ranking of New Hampshire Counties By Percentage of Population with Irish Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 281.32K people in New Hampshire with Irish ancestry (20.50% of New Hampshire population). Among all New Hampshire counties, Rockingham County had the highest percentage of its population with Irish ancestry (24.35%), followed by Carroll County (22.74%), and Strafford County (21.29%).
The chart and table below shows the top 10 counties with high percentage of its population having Irish ancestry.
You can see similar information for other states and for other ancestry groups in New Hampshire.
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Related Topics: New Hampshire ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of New Hampshire Counties By Percentage of Population with Irish Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Rockingham County | 24.35 |
| 2 | Carroll County | 22.74 |
| 3 | Strafford County | 21.29 |
| 4 | Hillsborough County | 20.74 |
| 5 | Belknap County | 20.01 |
| 6 | Merrimack County | 18.72 |
| 7 | Cheshire County | 17.50 |
| 8 | Grafton County | 15.50 |
| 9 | Coos County | 15.45 |
| 10 | Sullivan County | 11.84 |
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