RANKING · 2020 CENSUS · 14 SHOWN OF 14

Highest Irish population share, Massachusetts counties · 2020

Massachusetts counties ranked by the share of all residents who are Irish ancestry (2020 American Community Survey). A concentration measure: Irish residents as a percentage of total population. This list covers the 14 counties in Massachusetts that qualify, ranked against each other statewide. The median across all 14 is 18.5%.

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 2010

01Plymouth County, MAMA546,82930.0%−3.8 pts

02Barnstable County, MAMA233,53926.7%−0.3 pts

03Norfolk County, MAMA739,74925.5%−6.3 pts

04Dukes County, MAMA21,21921.3%+2.8 pts

05Essex County, MAMA826,65320.1%−3.2 pts

06Middlesex County, MAMA1,669,97919.3%−4.3 pts

07Worcester County, MAMA888,50218.5%−3.7 pts

08Franklin County, MAMA70,69818.4%−1.4 pts

09Hampshire County, MAMA164,06518.1%−4.1 pts

10Bristol County, MAMA593,64017.9%−1.4 pts

11Berkshire County, MAMA128,22417.5%−5.9 pts

12Nantucket County, MAMA14,75815.6%−3.2 pts

13Hampden County, MAMA464,33814.4%−3.0 pts

14Suffolk County, MAMA791,89113.0%−3.4 pts

SHOWING 1–14 OF 14

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