RANKING · 2020 CENSUS · 26 SHOWN OF 26

Most population lost, New Hampshire cities · 2020

New Hampshire cities that lost the most residents from the 2010 census to 2020, by raw count of people rather than percentage. This list covers the 26 cities in New Hampshire that qualify, ranked against each other statewide.

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New HampshireAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

YEAR2000 2010 2020 2024

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Berlin, NHNH9,502-626−58%

02Claremont, NHNH13,032-406−46%

03Keene, NHNH23,072-362−372%

04Hampton, NHNH10,101-59−105%

05Somersworth, NHNH12,171+89−61%

06Suncook, NHNH5,432+122−18%

07Hudson, NHNH7,469+198+5%

08Franklin, NHNH8,839+264+161%

09Milford, NHNH8,956+377+36%

10Hanover, NHNH8,479+442−71%

11South Hooksett, NHNH5,902+470−70%

12Newmarket, NHNH5,679+500+142%

13Londonderry, NHNH12,225+608–

14Durham, NHNH10,681+802−478%

15Derry, NHNH21,339+864−61%

16Exeter, NHNH9,964+867+327%

17Laconia, NHNH17,246+920+38%

18East Merrimack, NHNH5,081+979+665%

19Lebanon, NHNH15,481+1,131+194%

20Hooksett, NHNH5,876+1,136+3%

21Portsmouth, NHNH23,028+1,177−123%

22Concord, NHNH44,597+1,281−73%

23Rochester, NHNH33,716+2,740+50%

24Dover, NHNH34,623+2,754+50%

25Nashua, NHNH92,435+4,828−30%

26Manchester, NHNH116,818+6,079−18%

SHOWING 1–26 OF 26

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS