New Hampshire Counties by Population (2024)

Population

50K

100K

150K

200K

250K

300K

350K

400K

Hover/click a county for data.
County
2024 Pop.
Change (2020)
Area (mi²)
Density (/mi²)
Location
Hillsborough County427,2151.02%339487Hillsborough County location
Rockingham County321,7452.26%268463Rockingham County location
Merrimack County157,7472.41%360169Merrimack County location
Strafford County133,9152.17%142365Strafford County location
Grafton County93,1612.15%66055Grafton County location
Cheshire County77,9431.82%273110Cheshire County location
Belknap County65,3492.47%155163Belknap County location
Carroll County52,7424.97%36057Carroll County location
Sullivan County44,0202.21%20882Sullivan County location
Coos County31,2680.13%69317Coos County location
  1. New Hampshire State Data Center
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)

Sources