Ranking of New Jersey 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 1.19M people in New Jersey with Irish ancestry. Among all New Jersey counties, Monmouth County had the highest population with Irish ancestry (131.62K), followed by Ocean County (118.78K), and Bergen County (102.45K).
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 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 Population with Irish Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Monmouth County | 131621 |
| 2 | Ocean County | 118778 |
| 3 | Bergen County | 102447 |
| 4 | Camden County | 90970 |
| 5 | Morris County | 89294 |
| 6 | Burlington County | 83212 |
| 7 | Gloucester County | 77654 |
| 8 | Middlesex County | 72832 |
| 9 | Essex County | 44375 |
| 10 | Union County | 44247 |
| 11 | Atlantic County | 42763 |
| 12 | Hudson County | 41278 |
| 13 | Mercer County | 41227 |
| 14 | Somerset County | 39726 |
| 15 | Passaic County | 32859 |
| 16 | Sussex County | 32134 |
| 17 | Cape May County | 28427 |
| 18 | Hunterdon County | 24583 |
| 19 | Warren County | 21615 |
| 20 | Cumberland County | 13097 |
| 21 | Salem County | 12580 |
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