Data / Rankings / Foreign-born population share / Counties in New Hampshire

Counties in New Hampshire by foreign-born share of the population

Hillsborough County had the highest foreign-born share of the population of 10 counties in 2021, at 10%. Coos County had the lowest, at 2.4%. The median was 3.6% and the figure for New Hampshire was 6%. Source: the U.S. Census Bureau.

Highest10Hillsborough County
Lowest2.4Coos County
Median3.610 counties
New Hampshire6History

All counties, 2021

CSVChart (SVG)

Hillsborough CountyHillsborough County: 10 %10Grafton CountyGrafton County: 5.6 %5.6Merrimack CountyMerrimack County: 5 %5Rockingham CountyRockingham County: 4.9 %4.9Strafford CountyStrafford County: 4.4 %4.4Belknap CountyBelknap County: 2.9 %2.9Sullivan CountySullivan County: 2.9 %2.9Cheshire CountyCheshire County: 2.8 %2.8Carroll CountyCarroll County: 2.5 %2.5Coos CountyCoos County: 2.4 %2.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2021 (%)
1Hillsborough County10
2Grafton County5.6
3Merrimack County5
4Rockingham County4.9
5Strafford County4.4
6Belknap County2.9
7Sullivan County2.9
8Cheshire County2.8
9Carroll County2.5
10Coos County2.4

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/2021/table-based-SF/data/5YRData/acsdt5y2021-b05002.dat. Retrieved 2026-10-09.

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Rank Counties in New Hampshire by foreign-born share of the population using official data, and cite the source.
rank_places {"indicator":"foreign_born_share","level":"province","within":"New Hampshire","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=foreign_born_share&level=province&within=New%20Hampshire&limit=10

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Questions

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

Hillsborough County, with 10% in 2021, according to the U.S. Census Bureau.

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

Coos County, with 2.4% in 2021.

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 New Hampshire: more rankings