RANKING · 1990 CENSUS · 10 SHOWN OF 10

Youngest by median age, New Hampshire counties · 1990

New Hampshire counties with the youngest median age (1990 ACS). This list covers the 10 counties in New Hampshire that qualify, ranked against each other statewide. The median across all 10 is 33.5.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS –

01Strafford County, NHNH135,04330.6–

02Hillsborough County, NHNH433,41532.2–

03Grafton County, NHNH93,22532.3–

04Rockingham County, NHNH324,07732.6–

05Cheshire County, NHNH78,26933.4–

06Merrimack County, NHNH158,07833.5–

07Belknap County, NHNH65,14735.0–

08Sullivan County, NHNH43,96135.3–

09Coos County, NHNH31,34336.3–

10Carroll County, NHNH52,78436.8–

SHOWING 1–10 OF 10

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