RANKING · 2020 CENSUS · 10 SHOWN OF 10

Largest households, New Hampshire counties · 2020

New Hampshire counties ranked by average household size (2020 ACS). This list covers the 10 counties in New Hampshire that qualify, ranked against each other statewide.

New HampshireAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDMost expensive homes Cheapest homes Highest median rent Lowest median rent Highest homeownership rate Highest renter share

YEAR2010 2020 2024

RANKPLACESTATEPOPAVERAGE HOUSEHOLD SIZEVS 2010

01Hillsborough County, NHNH433,4152.50−2%

02Rockingham County, NHNH324,0772.50−2%

03Sullivan County, NHNH43,9612.46+4%

04Merrimack County, NHNH158,0782.43−1%

05Strafford County, NHNH135,0432.43−1%

06Grafton County, NHNH93,2252.38−1%

07Belknap County, NHNH65,1472.36+0%

08Cheshire County, NHNH78,2692.35−3%

09Carroll County, NHNH52,7842.16−9%

10Coos County, NHNH31,3432.11−2%

SHOWING 1–10 OF 10

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