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RANKING · 2025 ESTIMATES · 10 SHOWN OF 10

Fastest shrinking, New Hampshire counties

New Hampshire counties with the steepest population decline from the 2020 census to 2025. This list covers the 10 counties in New Hampshire that qualify, ranked against each other statewide.

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New HampshireAll statesAll rankings
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+0.2%−105%
02Sullivan County, NHNH43,961+2.1%−57%
03Belknap County, NHNH65,147+2.3%−84%
04Grafton County, NHNH93,225+2.3%−75%
05Cheshire County, NHNH78,269+2.4%−55%
06Hillsborough County, NHNH433,415+2.5%−81%
07Merrimack County, NHNH158,078+2.8%−79%
08Rockingham County, NHNH324,077+3.2%−75%
09Strafford County, NHNH135,043+3.2%−59%
10Carroll County, NHNH52,784+5.3%−77%
SHOWING 1–10 OF 10
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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES