RANKING · 2024 ACS · 21 SHOWN OF 21

Highest Irish population share, New Jersey counties

New Jersey counties ranked by the share of all residents who are Irish ancestry (2024 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. The median across all 21 is 15.7%.

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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 2010

01Cape May County, NJNJ93,39027.1%−3.8 pts

02Gloucester County, NJNJ312,63824.5%−3.9 pts

03Sussex County, NJNJ148,06321.2%−6.0 pts

04▲4Hunterdon County, NJNJ131,78119.7%−3.8 pts

05▼1Monmouth County, NJNJ651,03519.2%−4.2 pts

06▲3Burlington County, NJNJ481,43917.6%−4.5 pts

07▼1Ocean County, NJNJ673,74617.2%−6.3 pts

08▼3Warren County, NJNJ112,95316.9%−4.2 pts

09▼2Salem County, NJNJ66,28016.9%−3.7 pts

10▲1Morris County, NJNJ524,25116.8%−3.6 pts

11▼1Camden County, NJNJ535,79915.7%−4.9 pts

12Atlantic County, NJNJ278,65715.6%−2.4 pts

13Somerset County, NJNJ356,48610.8%−2.6 pts

14Bergen County, NJNJ977,0269.8%−4.0 pts

15Mercer County, NJNJ399,2899.8%−3.3 pts

16Cumberland County, NJNJ157,1487.9%−2.4 pts

17Middlesex County, NJNJ883,3357.8%−3.3 pts

18Union County, NJNJ601,8637.1%−2.8 pts

19▲1Hudson County, NJNJ735,0336.0%−1.5 pts

20▼1Passaic County, NJNJ531,6246.0%−3.4 pts

21Essex County, NJNJ896,3795.4%−1.4 pts

SHOWING 1–21 OF 21

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES