RANKING · 2010 CENSUS · 10 SHOWN OF 10

Fastest growing, New Hampshire counties · 2010

New Hampshire counties ranked by population growth from the 2000 census to 2010. This list covers the 10 counties in New Hampshire that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Strafford County, NHNH135,043+9.7%+2.0 pts

02Carroll County, NHNH52,784+9.5%−13.8 pts

03Grafton County, NHNH93,225+9.0%−0.1 pts

04Sullivan County, NHNH43,961+8.1%+3.3 pts

05Merrimack County, NHNH158,078+7.5%−6.0 pts

06Belknap County, NHNH65,147+6.7%−7.8 pts

07Rockingham County, NHNH324,077+6.4%−6.4 pts

08Hillsborough County, NHNH433,415+5.2%−8.1 pts

09Cheshire County, NHNH78,269+4.5%−0.8 pts

10Coos County, NHNH31,343-0.2%+4.8 pts

SHOWING 1–10 OF 10

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS