RANKING · 2020 CENSUS · 16 SHOWN OF 16

Highest Irish population share, Maine counties · 2020

Maine 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 16 counties in Maine that qualify, ranked against each other statewide.

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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

01Cumberland County, MEME317,22219.6%–

02York County, MEME222,43418.4%–

03Lincoln County, MEME36,59517.5%–

04Piscataquis County, MEME17,40916.5%–

05Oxford County, MEME60,34616.2%–

06Penobscot County, MEME157,96716.2%–

07Kennebec County, MEME129,06716.0%–

08Hancock County, MEME57,17114.9%–

09Washington County, MEME31,33414.8%–

10Franklin County, MEME30,82414.7%–

11Sagadahoc County, MEME37,97914.6%–

12Androscoggin County, MEME116,48714.5%–

13Aroostook County, MEME66,60914.2%–

14Somerset County, MEME51,62014.0%–

15Knox County, MEME41,11713.9%–

16Waldo County, MEME40,69313.4%–

SHOWING 1–16 OF 16

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