RANKING · 2010 CENSUS · 21 SHOWN OF 21

Highest Irish population share, New Jersey counties · 2010

New Jersey counties ranked by the share of all residents who are Irish ancestry (2010 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 20.4%.

Irish Americans: full group profile →

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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 –

01Cape May County, NJNJ93,39030.9%–

02Gloucester County, NJNJ312,63828.4%–

03Sussex County, NJNJ148,06327.2%–

04Hunterdon County, NJNJ131,78123.5%–

05Ocean County, NJNJ673,74623.5%–

06Monmouth County, NJNJ651,03523.4%–

07Burlington County, NJNJ481,43922.0%–

08Warren County, NJNJ112,95321.1%–

09Camden County, NJNJ535,79920.7%–

10Salem County, NJNJ66,28020.5%–

11Morris County, NJNJ524,25120.4%–

12Atlantic County, NJNJ278,65718.0%–

13Bergen County, NJNJ977,02613.8%–

14Somerset County, NJNJ356,48613.4%–

15Mercer County, NJNJ399,28913.1%–

16Middlesex County, NJNJ883,33511.1%–

17Cumberland County, NJNJ157,14810.3%–

18Union County, NJNJ601,8639.8%–

19Passaic County, NJNJ531,6249.4%–

20Hudson County, NJNJ735,0337.6%–

21Essex County, NJNJ896,3796.8%–

SHOWING 1–21 OF 21

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS