New Hampshire

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New Hampshire counties by population

Number of counties: 10
Population: 1,372,175
Largest county: Hillsborough County
Table of counties in New Hampshire sorted by population from largest to smallest.
CountyPopulation
Hillsborough County420,504
Rockingham County312,771
Merrimack County152,983
Strafford County130,598
Grafton County91,025
Cheshire County76,473
Belknap County63,395
Carroll County49,961
Sullivan County43,105
Coos County31,360

What is the largest county in New Hampshire?

Hillsborough County is the largest county in New Hampshire with a population of 420,504.

TOP-5 counties by population in New Hampshire:
  • Hillsborough County
  • Rockingham County
  • Merrimack County
  • Strafford County
  • Grafton County