Ranking of New Jersey 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 1.19M people in New Jersey with Irish ancestry (12.84% of New Jersey population). Among all New Jersey counties, Cape May County had the highest percentage of its population with Irish ancestry (29.77%), followed by Gloucester County (25.81%), and Sussex County (22.24%).
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 Jersey.
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Related Topics: New Jersey ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of New Jersey Counties By Percentage of Population with Irish Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Cape May County | 29.77 |
| 2 | Gloucester County | 25.81 |
| 3 | Sussex County | 22.24 |
| 4 | Monmouth County | 20.50 |
| 5 | Warren County | 19.77 |
| 6 | Salem County | 19.43 |
| 7 | Hunterdon County | 19.09 |
| 8 | Ocean County | 18.85 |
| 9 | Burlington County | 18.09 |
| 10 | Morris County | 17.57 |
| 11 | Camden County | 17.45 |
| 12 | Atlantic County | 15.62 |
| 13 | Somerset County | 11.55 |
| 14 | Bergen County | 10.75 |
| 15 | Mercer County | 10.71 |
| 16 | Middlesex County | 8.48 |
| 17 | Cumberland County | 8.45 |
| 18 | Union County | 7.74 |
| 19 | Passaic County | 6.31 |
| 20 | Hudson County | 5.79 |
| 21 | Essex County | 5.20 |
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