RANKING · 2020 CENSUS · 21 SHOWN OF 21

Highest Irish population share, New Jersey counties · 2020

New Jersey counties ranked by the share of all residents who are Irish ancestry (2023 American Community Survey). A concentration measure: Irish residents as a percentage of total population. This list covers the 21 counties in New Jersey that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH SHAREVS 2000

01Cape May County, NJNJ93,39030.1%–

02Gloucester County, NJNJ312,63826.7%–

03Sussex County, NJNJ148,06321.7%–

04Monmouth County, NJNJ651,03521.2%–

05Warren County, NJNJ112,95320.8%–

06Ocean County, NJNJ673,74620.2%–

07Salem County, NJNJ66,28019.8%–

08Hunterdon County, NJNJ131,78119.1%–

09Burlington County, NJNJ481,43918.8%–

10Camden County, NJNJ535,79918.2%–

11Morris County, NJNJ524,25117.6%–

12Atlantic County, NJNJ278,65715.6%–

13Somerset County, NJNJ356,48611.8%–

14Bergen County, NJNJ977,02611.2%–

15Mercer County, NJNJ399,28910.7%–

16Cumberland County, NJNJ157,1489.5%–

17Middlesex County, NJNJ883,3358.9%–

18Union County, NJNJ601,8637.8%–

19Passaic County, NJNJ531,6246.8%–

20Hudson County, NJNJ735,0335.8%–

21Essex County, NJNJ896,3795.3%–

SHOWING 1–21 OF 21

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UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES