Counties in New Hampshire
Each county page says how cases move there under New Hampshire's rules, and lists the police agencies that serve it.
10 counties, largest first
- Hillsborough County433,415 people · 32 agencies
- Rockingham County324,077 people · 39 agencies
- Merrimack County158,078 people · 30 agencies
- Strafford County135,043 people · 16 agencies
- Grafton County93,225 people · 37 agencies
- Cheshire County78,269 people · 25 agencies
- Belknap County65,147 people · 13 agencies
- Carroll County52,784 people · 16 agencies
- Sullivan County43,961 people · 17 agencies
- Coos County31,343 people · 15 agencies
Population: Census Bureau county population estimates, Vintage 2025 (cc-est2025-alldata), July 1, 2025.