RANKING · 2010 CENSUS · 10 SHOWN OF 10

Fastest growing, New Hampshire counties · 2010

New Hampshire counties ranked by population growth since the prior decennial census. 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 densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Strafford County, NHNH135,043+9.7%+27%

02Carroll County, NHNH52,784+9.5%−59%

03Grafton County, NHNH93,225+9.0%−1%

04Sullivan County, NHNH43,961+8.1%+68%

05Merrimack County, NHNH158,078+7.5%−44%

06Belknap County, NHNH65,147+6.7%−54%

07Rockingham County, NHNH324,077+6.4%−50%

08Hillsborough County, NHNH433,415+5.2%−61%

09Cheshire County, NHNH78,269+4.5%−16%

10Coos County, NHNH31,343-0.2%−97%

SHOWING 1–10 OF 10

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES