Data / Rankings / Foreign-born population share / Counties in Maine

Counties in Maine by foreign-born share of the population

Cumberland County had the highest foreign-born share of the population of 16 counties in 2023, at 6.5%. Somerset County had the lowest, at 1.5%. The median was 3% and the figure for Maine was 3.9%. Source: the U.S. Census Bureau.

Highest6.5Cumberland County
Lowest1.5Somerset County
Median316 counties
Maine3.9History

All counties, 2023

CSVChart (SVG)

Cumberland CountyCumberland County: 6.5 %6.5Androscoggin CountyAndroscoggin County: 4.9 %4.9Aroostook CountyAroostook County: 4.1 %4.1York CountyYork County: 3.8 %3.8Washington CountyWashington County: 3.3 %3.3Penobscot CountyPenobscot County: 3.2 %3.2Hancock CountyHancock County: 3 %3Sagadahoc CountySagadahoc County: 3 %3Franklin CountyFranklin County: 3 %3Knox CountyKnox County: 3 %3Kennebec CountyKennebec County: 2.4 %2.4Piscataquis CountyPiscataquis County: 2.3 %2.3Waldo CountyWaldo County: 2.2 %2.2Lincoln CountyLincoln County: 1.9 %1.9Oxford CountyOxford County: 1.5 %1.5Somerset CountySomerset County: 1.5 %1.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2023 (%)Change on 2022
1Cumberland County6.5+0.1 pts
2Androscoggin County4.90 pts
3Aroostook County4.10 pts
4York County3.8+0.3 pts
5Washington County3.3-0.2 pts
6Penobscot County3.2+0.2 pts
7Hancock County3+0.2 pts
7Sagadahoc County3-0.1 pts
9Franklin County3+0.6 pts
10Knox County3-0 pts
11Kennebec County2.4-0.1 pts
12Piscataquis County2.3+0.3 pts
13Waldo County2.20 pts
14Lincoln County1.9-0.1 pts
15Oxford County1.5+0.1 pts
16Somerset County1.5-0.1 pts

Other periods

About this ranking

People who were not US citizens at birth, as a percentage of the total population. Includes naturalized citizens, lawful permanent residents, temporary migrants and unauthorized immigrants. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Based on place of birth, not nationality: a naturalized citizen counts as foreign born, and people born in Puerto Rico, the US island areas or abroad to American parents count as native. Not comparable with foreign_population_share, which counts foreign nationals in Spain and the EU. Calculated from counts in ACS table B05002, which are stored as inputs.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b05002.dat. Retrieved 2026-10-09.

Use this data in your AI agent

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Rank Counties in Maine by foreign-born share of the population using official data, and cite the source.
rank_places {"indicator":"foreign_born_share","level":"province","within":"Maine","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=foreign_born_share&level=province&within=Maine&limit=10

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Questions

Which county has the highest foreign-born share of the population?

Cumberland County, with 6.5% in 2023, according to the U.S. Census Bureau.

Which county has the lowest foreign-born share of the population?

Somerset County, with 1.5% in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. Retrieved 2026-10-09.

Foreign-born population share: other rankings

Counties in Maine: more rankings