
Sunapee
- County:
- Sullivan County
- County Seat:
- No
- Area (mi²):
- 21.053
- State:
- New Hampshire
Sunapee is located in Sullivan County, New Hampshire. Sunapee has a 2025 population of 3,468. Sunapee is currently growing at a rate of 0.32% annually and its population has increased by 3.62% since the most recent census, which recorded a population of 3,347 in 2020.
The average household income in Sunapee is $133,482 with a poverty rate of 16.13%. The median age in Sunapee is 56.5 years: 56.3 years for males, and 59.6 years for females.