RANKING · 2024 ACS · 10 SHOWN OF 10

Youngest by median age, New Hampshire counties

New Hampshire counties with the youngest median age (2023 ACS). This list covers the 10 counties in New Hampshire that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDOldest by median age Most foreign-born residents Highest uninsured rate Most women Most men Highest disability rate

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Strafford County, NHNH135,04338.2+11%

02Hillsborough County, NHNH433,41541.0+14%

03Merrimack County, NHNH158,07842.9+14%

04Cheshire County, NHNH78,26943.6+16%

05Grafton County, NHNH93,22544.1+19%

06Rockingham County, NHNH324,07745.0+21%

07Sullivan County, NHNH43,96147.0+18%

08Belknap County, NHNH65,14748.4+21%

09Coos County, NHNH31,34350.3+21%

10Carroll County, NHNH52,78454.6+28%

SHOWING 1–10 OF 10

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