RANKING · 2010 CENSUS · 10 SHOWN OF 10

Fastest shrinking, New Hampshire counties · 2010

New Hampshire counties with the steepest population decline 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

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Coos County, NHNH31,343-0.2%+4.8 pts

02Cheshire County, NHNH78,269+4.5%−0.8 pts

03Hillsborough County, NHNH433,415+5.2%−8.1 pts

04Rockingham County, NHNH324,077+6.4%−6.4 pts

05Belknap County, NHNH65,147+6.7%−7.8 pts

06Merrimack County, NHNH158,078+7.5%−6.0 pts

07Sullivan County, NHNH43,961+8.1%+3.3 pts

08Grafton County, NHNH93,225+9.0%−0.1 pts

09Carroll County, NHNH52,784+9.5%−13.8 pts

10Strafford County, NHNH135,043+9.7%+2.0 pts

SHOWING 1–10 OF 10

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