Ranking of New Hampshire Counties By 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. Among all New Hampshire counties, Hillsborough County had the highest population with Irish ancestry (87.22K), followed by Rockingham County (76.17K), and Merrimack County (28.64K).
The chart and table below shows the top 10 counties with high number of people with 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 Population with Irish Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Hillsborough County | 87216 |
| 2 | Rockingham County | 76173 |
| 3 | Merrimack County | 28640 |
| 4 | Strafford County | 27805 |
| 5 | Grafton County | 14106 |
| 6 | Cheshire County | 13380 |
| 7 | Belknap County | 12687 |
| 8 | Carroll County | 11360 |
| 9 | Sullivan County | 5105 |
| 10 | Coos County | 4844 |
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