
Belknap County
- State:
- New Hampshire
Belknap County's estimated 2025 population is 65,671 with a growth rate of 0.49% in the past year according to the most recent United States census data. Belknap County is the 7th largest county in New Hampshire. The 2010 population was 60,101 and has seen a growth of 9.27% since that time.