
Thornton
- County:
- Grafton County
- County Seat:
- No
- Area (mi²):
- 50.091
- State:
- New Hampshire
Thornton is located in Grafton County, New Hampshire. Thornton has a 2025 population of 2,908. Thornton is currently growing at a rate of 1.22% annually and its population has increased by 7.39% since the most recent census, which recorded a population of 2,708 in 2020.
The average household income in Thornton is $99,794 with a poverty rate of 8.6%. The median age in Thornton is 47.3 years: 44.8 years for males, and 49.2 years for females.