RANKING · 2020 CENSUS · 10 SHOWN OF 10

Fastest shrinking, New Hampshire counties · 2020

New Hampshire counties with the steepest population decline from the 2010 census to 2020. 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, NHNH31,343-5.4%−0.5 pts

02Sullivan County, NHNH43,961-1.6%−6.4 pts

03Cheshire County, NHNH78,269-0.9%−6.1 pts

04Grafton County, NHNH93,225+2.2%−6.8 pts

05Carroll County, NHNH52,784+4.8%−18.5 pts

06Merrimack County, NHNH158,078+5.0%−8.5 pts

07Hillsborough County, NHNH433,415+5.5%−7.8 pts

08Belknap County, NHNH65,147+6.0%−8.4 pts

09Strafford County, NHNH135,043+6.3%−1.4 pts

10Rockingham County, NHNH324,077+6.4%−6.4 pts

SHOWING 1–10 OF 10

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