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RANKING · 2000 CENSUS · 10 SHOWN OF 10

Most population gained, New Hampshire counties · 2000

New Hampshire counties that added the most residents from the 1990 census to 2000, by raw count of people rather than percentage. This list covers the 10 counties in New Hampshire that qualify, ranked against each other statewide. The median across all 10 is +8,000.

Flip the list · Most population lost, US counties →
SAME RANKING BYCitiesStatesMetros
Most population gained by state
All USAlaskaAlabamaArkansasArizonaCaliforniaColoradoFloridaGeorgiaIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyoming
RANKPLACESTATEPOPPOPULATION CHANGEVS –
01Hillsborough County, NHNH433,415+44,768–
02Rockingham County, NHNH324,077+31,514–
03Merrimack County, NHNH158,078+16,220–
04Carroll County, NHNH52,784+8,256–
05Strafford County, NHNH135,043+8,000–
06Belknap County, NHNH65,147+7,109–
07Grafton County, NHNH93,225+6,814–
08Cheshire County, NHNH78,269+3,704–
09Sullivan County, NHNH43,961+1,866–
10Coos County, NHNH31,343-1,717–
SHOWING 1–10 OF 10

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS