THE SULLIVAN COUNTY LAND BRIEF
Land in the
Sunapee Uplands setting.
Sullivan County has 537.9 square miles of land in New Hampshire. 4 mapped landscape regions meet across Sullivan County: Sunapee Uplands, Vermont Piedmont, Northern Connecticut Valley, among others.
Forested hills and mountains span northern New England, the Adirondacks and higher Catskills. Glacial lakes and steep streams accompany a transition between northern hardwood and spruce-fir forests.
Regional context: Northeastern Highlands ↗ · Regional mapping across the county footprint
Where the landscape changes
Sullivan County intersects 4 mapped regional units. The largest mapped shares are:
- Sunapee Uplands75.1%
- Vermont Piedmont20.1%
- Northern Connecticut Valley4.5%
- Worcester/Monadnock Plateau0.4%
Finding your parcel within Sullivan County
The atlas lists 18 cities, towns, townships, and Census communities associated with Sullivan County, including Plainfield, Washington, Springfield. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Sullivan County by land and water
The Census records 14.3 square miles of water within Sullivan County, or 2.6% of its total area. That share is close to Sullivan County’s 2.6%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Sullivan County has 12.3 times the land area of nearby Newport town (43.6 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Cheshire County, Grafton County, Hillsborough County, Merrimack County within New Hampshire. A tract near one of these lines should be matched to the county identifier on its own records.