Ranking of Maine Counties By Population with Unclassified Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 303.88K people in Maine with Unclassified ancestry. Among all Maine counties, Cumberland County had the highest population with Unclassified ancestry (62.80K), followed by York County (45.04K), and Penobscot County (39.19K).

The chart and table below shows the top 10 counties with high number of people with Unclassified 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 Unclassified Ancestry in 2021
Cumberland County
York County
Penobscot County
Kennebec County
Androscoggin County
Aroostook County
Oxford County
Somerset County
Hancock County
Knox County
Ranking of Maine Counties By Population with Unclassified Ancestry in 2021
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Rank County Population
1 Cumberland County 62795
2 York County 45044
3 Penobscot County 39194
4 Kennebec County 26520
5 Androscoggin County 19601
6 Aroostook County 15121
7 Oxford County 13334
8 Somerset County 13170
9 Hancock County 11512
10 Knox County 10081
11 Waldo County 9934
12 Sagadahoc County 9790
13 Washington County 7939
14 Lincoln County 7792
15 Franklin County 7694
16 Piscataquis County 4354