RANKING · 1990 CENSUS · 10 SHOWN OF 10

Youngest by median age, New Hampshire counties · 1990

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, NHNH135,04330.6−11%

02Hillsborough County, NHNH433,41532.2−10%

03Grafton County, NHNH93,22532.3−13%

04Rockingham County, NHNH324,07732.6−12%

05Cheshire County, NHNH78,26933.4−11%

06Merrimack County, NHNH158,07833.5−11%

07Belknap County, NHNH65,14735.0−13%

08Sullivan County, NHNH43,96135.3−12%

09Coos County, NHNH31,34336.3−13%

10Carroll County, NHNH52,78436.8−13%

SHOWING 1–10 OF 10

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