Sullivan County
Also known as Sullivan County, New Hampshire, Sullivan County, NH
county in New Hampshire, United States
Key facts
- Country
- United States
- State
- New Hampshire
- Named after
- John Sullivan
- Seat
- Newport
- Largest city
- Claremont
- Total
- 552.1 sq mi (1,430 km )
- Land
- 537.5 sq mi (1,392 km )
- Water
- 14.6 sq mi (38 km ) 2.6%
- Estimate 2025
- 43,961
- Density
- 80.1/sq mi (30.9/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
- UTC−4 ( EDT )
- Congressional district
Article
Sullivan County is a county in the U.S. state of New Hampshire. As of the 2020 census, the population was 43,063, making it the second-least populous county in New Hampshire. Its county seat is Newport.
Sullivan County is included in the Claremont-Lebanon, NH-VT Micropolitan Statistical Area.
Gallery (3)
On the map
2 mapped locations