RANKING · 2010 CENSUS · 10 SHOWN OF 10

Youngest by median age, New Hampshire counties · 2010

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, NHNH135,04336.9+7%

02Hillsborough County, NHNH433,41539.3+9%

03Cheshire County, NHNH78,26940.7+8%

04Grafton County, NHNH93,22541.2+11%

05Merrimack County, NHNH158,07841.4+10%

06Rockingham County, NHNH324,07742.2+13%

07Sullivan County, NHNH43,96143.9+10%

08Belknap County, NHNH65,14744.7+11%

09Coos County, NHNH31,34346.4+12%

10Carroll County, NHNH52,78448.3+14%

SHOWING 1–10 OF 10

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