Ranking of Maine Counties By Population with Irish Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 222.26K people in Maine with Irish ancestry. Among all Maine counties, Cumberland County had the highest population with Irish ancestry (57.43K), followed by York County (38.49K), and Penobscot County (23.77K).

The chart and table below shows the top 10 counties with high number of people with Irish ancestry.

You can see similar information for other states and for other ancestry groups in Maine.

Data Source: US Census Bureau.
Ranking of Maine Counties By Population with Irish Ancestry in 2021
Cumberland County
York County
Penobscot County
Kennebec County
Androscoggin County
Aroostook County
Oxford County
Hancock County
Somerset County
Lincoln County
Ranking of Maine Counties By Population with Irish Ancestry in 2021
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Rank County Population
1 Cumberland County 57425
2 York County 38488
3 Penobscot County 23770
4 Kennebec County 19432
5 Androscoggin County 15417
6 Aroostook County 9365
7 Oxford County 9252
8 Hancock County 8373
9 Somerset County 7193
10 Lincoln County 5750
11 Waldo County 5611
12 Knox County 5453
13 Sagadahoc County 5298
14 Washington County 4312
15 Franklin County 4276
16 Piscataquis County 2840