THE COOS COUNTY LAND BRIEF
Land in the
Quebec/New England Boundary Mountains setting.
Coos County has 1,794.6 square miles of land in New Hampshire. 5 mapped landscape regions meet across Coos County: Quebec/New England Boundary Mountains, White Mountains/Blue Mountains, Upper Montane/Alpine Zone, 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
Coos County intersects 5 mapped regional units. The largest mapped shares are:
- Quebec/New England Boundary Mountains56.6%
- White Mountains/Blue Mountains19.1%
- Upper Montane/Alpine Zone12.8%
- White Mountain Foothills8.8%
- Northern Connecticut Valley2.7%
Finding your parcel within Coos County
The atlas lists 26 cities, towns, townships, and Census communities associated with Coos County, including Pittsburg, Stratford, Milan. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Coos County by land and water
The Census records 35.7 square miles of water within Coos County, or 2% of its total area. That share is close to Coos County’s 2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Coos County has 37.4 times the land area of nearby Dummer town (48 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Carroll County, Grafton County within New Hampshire. A tract near one of these lines should be matched to the county identifier on its own records.

