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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 BYCitiesStatesMetros
RELATEDLargest by populationFastest growingMost population gainedMost population lostMost densely populatedMost sparsely populated
YEAR2000201020202025
Fastest shrinking by state
All USAlaskaAlabamaArkansasArizonaCaliforniaColoradoFloridaGeorgiaIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyoming
RANKPLACESTATEPOPPOPULATION GROWTHVS 2000
01Coos County, NHNH31,343-5.4%+10%
02Sullivan County, NHNH43,961-1.6%−132%
03Cheshire County, NHNH78,269-0.9%−116%
04Grafton County, NHNH93,225+2.2%−75%
05Carroll County, NHNH52,784+4.8%−79%
06Merrimack County, NHNH158,078+5.0%−63%
07Hillsborough County, NHNH433,415+5.5%−58%
08Belknap County, NHNH65,147+6.0%−58%
09Strafford County, NHNH135,043+6.3%−18%
10Rockingham County, NHNH324,077+6.4%−50%
SHOWING 1–10 OF 10
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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS