RANKING · 2010 CENSUS · 10 SHOWN OF 10

Oldest by median age, New Hampshire counties · 2010

New Hampshire counties ranked by median age of residents (2010 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

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 2000

01Carroll County, NHNH52,78448.3+14%

02Coos County, NHNH31,34346.4+12%

03Belknap County, NHNH65,14744.7+11%

04Sullivan County, NHNH43,96143.9+10%

05Rockingham County, NHNH324,07742.2+13%

06Merrimack County, NHNH158,07841.4+10%

07Grafton County, NHNH93,22541.2+11%

08Cheshire County, NHNH78,26940.7+8%

09Hillsborough County, NHNH433,41539.3+9%

10Strafford County, NHNH135,04336.9+7%

SHOWING 1–10 OF 10

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS