Ranking of Maine Counties By Percentage of 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 (22.39% of Maine population). Among all Maine counties, Sagadahoc County had the highest percentage of its population with Unclassified ancestry (26.80%), followed by Somerset County (26.12%), and Franklin County (26.09%).

The chart and table below shows the top 10 counties with high percentage of its population having 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 Percentage of Population with Unclassified Ancestry in 2021
Sagadahoc County
Somerset County
Franklin County
Piscataquis County
Penobscot County
Washington County
Waldo County
Knox County
Oxford County
Aroostook County
Ranking of Maine Counties By Percentage of Population with Unclassified Ancestry in 2021
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Rank County Percentage of Pop. (%)
1 Sagadahoc County 26.80
2 Somerset County 26.12
3 Franklin County 26.09
4 Piscataquis County 25.98
5 Penobscot County 25.75
6 Washington County 25.61
7 Waldo County 25.07
8 Knox County 24.88
9 Oxford County 23.07
10 Aroostook County 22.48
11 Lincoln County 22.22
12 Kennebec County 21.51
13 York County 21.40
14 Cumberland County 20.88
15 Hancock County 20.77
16 Androscoggin County 17.76