RANKING · 2020 CENSUS · 21 SHOWN OF 21

Largest Irish population, New Jersey counties · 2020

New Jersey counties ranked by the number of residents who are Irish ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 21 counties in New Jersey that qualify, ranked against each other statewide. The median across all 21 is 41,286.

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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 POPULATIONVS 2010

01Monmouth County, NJNJ651,035131,343−11%

02Ocean County, NJNJ673,746121,857−9%

03Bergen County, NJNJ977,026104,224−16%

04Camden County, NJNJ535,79992,041−13%

05Morris County, NJNJ524,25186,859−13%

06Burlington County, NJNJ481,43983,724−15%

07Gloucester County, NJNJ312,63877,782−4%

08Middlesex County, NJNJ883,33573,835−17%

09Union County, NJNJ601,86343,141−17%

10Essex County, NJNJ896,37942,589−20%

11Atlantic County, NJNJ278,65741,286−16%

12Mercer County, NJNJ399,28939,382−17%

13Hudson County, NJNJ735,03339,071−17%

14Somerset County, NJNJ356,48638,936−9%

15Passaic County, NJNJ531,62434,168−27%

16Sussex County, NJNJ148,06330,594−25%

17Cape May County, NJNJ93,39027,887−8%

18Hunterdon County, NJNJ131,78123,847−21%

19Warren County, NJNJ112,95322,003−4%

20Cumberland County, NJNJ157,14814,309−10%

21Salem County, NJNJ66,28012,423−8%

SHOWING 1–21 OF 21

Download CSV (full list, 21 rows)

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