RANKING · 2024 ACS · 10 SHOWN OF 10

Largest households, New Hampshire counties

New Hampshire counties ranked by average household size (2024 ACS). This list covers the 10 counties in New Hampshire that qualify, ranked against each other statewide. The median across all 10 is 2.41.

New HampshireAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR2010 2020 2024

RANKPLACESTATEPOPAVERAGE HOUSEHOLD SIZEVS 2010

01▲2Sullivan County, NHNH43,9612.59+9%

02▼1Hillsborough County, NHNH433,4152.48−3%

03▼1Rockingham County, NHNH324,0772.48−3%

04Merrimack County, NHNH158,0782.460%

05▲2Belknap County, NHNH65,1472.41+3%

06▲2Cheshire County, NHNH78,2692.40−1%

07▼2Strafford County, NHNH135,0432.39−3%

08▲1Carroll County, NHNH52,7842.34−2%

09▼3Grafton County, NHNH93,2252.29−5%

10Coos County, NHNH31,3432.08−3%

SHOWING 1–10 OF 10

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES