RANKING · 2010 CENSUS · 10 SHOWN OF 10

Youngest by median age, New Hampshire counties · 2010

New Hampshire counties with the youngest median age (2010 ACS). This list covers the 10 counties in New Hampshire that qualify, ranked against each other statewide. The median across all 10 is 42.2.

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SAME RANKING BYCities States Metros ZIP codes

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 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS