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.

Flip the list · Oldest by median age, US counties →

New HampshireAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

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

Download CSV (full list, 10 rows)

UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS