THE BOUNDARY COUNTY LAND BRIEF
Land in the
Selkirk Mountains setting.
Boundary County has 1,268.7 square miles of land in Idaho. 5 mapped landscape regions meet across Boundary County: Selkirk Mountains, Purcell-Cabinet-North Bitterroot Mountains, Kootenai Valley, among others.
The Northern Rockies contain rugged ranges, glacial lakes and mixed conifer forests. Moist Pacific influences reach some inland valleys, producing forest communities unlike the drier mountain regions farther south.
Regional context: Northern Rockies ↗ · Regional mapping across the county footprint
Where the landscape changes
Boundary County intersects 5 mapped regional units. The largest mapped shares are:
- Selkirk Mountains43.6%
- Purcell-Cabinet-North Bitterroot Mountains28.8%
- Kootenai Valley16.4%
- High Northern Rockies8.1%
- Inland Maritime Foothills and Valleys3.1%
Finding your parcel within Boundary County
The atlas lists 2 cities, towns, townships, and Census communities associated with Boundary County, including Bonners Ferry, Moyie Springs. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Boundary County by land and water
The Census records 9.37 square miles of water within Boundary County, or 0.7% of its total area. That share is close to Boundary County’s 0.7%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Boundary County has 554 times the land area of nearby Bonners Ferry city (2.29 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Bonner County within Idaho. A tract near one of these lines should be matched to the county identifier on its own records.

