RANKING · 2024 ACS · 16 SHOWN OF 16

Highest Scotch-Irish population share, Maine counties

Maine counties ranked by the share of all residents who are Scotch-Irish ancestry (2024 American Community Survey). A concentration measure: Scotch-Irish residents as a percentage of total population. This list covers the 16 counties in Maine that qualify, ranked against each other statewide. The median across all 16 is 1.4%. Biggest climber in the top 100 since 2020: Penobscot County, ME, up 10 places to #4.

Scotch-Irish Americans: full group profile →

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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

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2010

01Knox County, MEME41,1172.7%−0.6 pts

02Waldo County, MEME40,6931.7%−3.5 pts

03▲5Washington County, MEME31,3341.6%−3.1 pts

04▲10Penobscot County, MEME157,9671.6%−3.0 pts

05▼2Cumberland County, MEME317,2221.6%−2.2 pts

06▲10York County, MEME222,4341.5%−2.0 pts

07▼1Sagadahoc County, MEME37,9791.4%−2.4 pts

08▲4Kennebec County, MEME129,0671.4%−2.4 pts

09▲6Piscataquis County, MEME17,4091.3%−1.7 pts

10▲1Lincoln County, MEME36,5951.2%−2.1 pts

11▼6Hancock County, MEME57,1711.2%−2.8 pts

12▼2Oxford County, MEME60,3461.2%−2.4 pts

13▼6Androscoggin County, MEME116,4871.0%−2.0 pts

14▼5Aroostook County, MEME66,6090.9%−2.3 pts

15▼2Franklin County, MEME30,8240.8%−1.8 pts

16▼12Somerset County, MEME51,6200.7%−2.6 pts

SHOWING 1–16 OF 16

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