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RANKING · 2020 CENSUS · 10 SHOWN OF 10

Highest Irish population share, New Hampshire counties · 2020

New Hampshire counties ranked by the share of all residents who are Irish ancestry (2020 American Community Survey). A concentration measure: Irish residents as a percentage of total population. This list covers the 10 counties in New Hampshire that qualify, ranked against each other statewide. The median across all 10 is 19.6%.

Irish Americans: full group profile →
SAME RANKING BYCitiesStatesMetros
Highest Irish population share by state
All USAlaskaAlabamaArkansasArizonaCaliforniaColoradoFloridaGeorgiaIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyoming
RANKPLACESTATEPOPIRISH SHAREVS 2010
01Rockingham County, NHNH324,07724.5%−2.4 pts
02Carroll County, NHNH52,78423.9%−0.8 pts
03Hillsborough County, NHNH433,41520.8%−2.0 pts
04Strafford County, NHNH135,04320.8%+1.0 pts
05Belknap County, NHNH65,14719.6%−1.0 pts
06Merrimack County, NHNH158,07818.5%−1.9 pts
07Cheshire County, NHNH78,26918.3%−0.9 pts
08Coos County, NHNH31,34315.8%−1.1 pts
09Grafton County, NHNH93,22515.7%−3.0 pts
10Sullivan County, NHNH43,96112.5%−3.8 pts
SHOWING 1–10 OF 10

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS