RANKING · 2020 CENSUS · 26 SHOWN OF 26

Fastest shrinking, New Hampshire cities

New Hampshire cities with the steepest population decline since the prior decennial census. 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

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Berlin, NHNH9,502-6.2%−51%

02Claremont, NHNH13,032-3.0%−44%

03Keene, NHNH23,072-1.5%−361%

04Hampton, NHNH10,101-0.6%−104%

05Somersworth, NHNH12,171+0.8%−63%

06Suncook, NHNH5,432+2.3%−20%

07Hudson, NHNH7,469+2.7%+9%

08Concord, NHNH44,597+3.0%−77%

09Franklin, NHNH8,839+3.1%+156%

10Derry, NHNH21,339+3.9%−64%

11Milford, NHNH8,956+4.3%+23%

12Hanover, NHNH8,479+5.1%−78%

13Londonderry, NHNH12,225+5.5%–

14Manchester, NHNH116,818+5.5%−26%

15Nashua, NHNH92,435+5.6%−36%

16Portsmouth, NHNH23,028+5.7%−129%

17Laconia, NHNH17,246+5.8%+36%

18Durham, NHNH10,681+7.8%−438%

19Lebanon, NHNH15,481+8.6%+172%

20South Hooksett, NHNH5,902+8.7%−80%

21Dover, NHNH34,623+9.2%+25%

22Rochester, NHNH33,716+9.2%+34%

23Exeter, NHNH9,964+9.4%+342%

24Newmarket, NHNH5,679+9.4%+124%

25East Merrimack, NHNH5,081+23.3%+566%

26Hooksett, NHNH5,876+27.4%−37%

SHOWING 1–26 OF 26

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