THE CANYON COUNTY LAND BRIEF
Land in the
Treasure Valley setting.
Canyon County has 587 square miles of land in Idaho. 3 mapped landscape regions meet across Canyon County: Treasure Valley, Unwooded Alkaline Foothills, Mountain Home Uplands.
The Snake River Plain is lower and gentler than its surrounding mountains. Alluvial valleys, sagebrush-covered plains, low hills and scattered lava fields form its principal landscape patterns.
Regional context: Snake River Plain ↗ · Regional mapping across the county footprint
Where the landscape changes
Canyon County intersects 3 mapped regional units. The largest mapped shares are:
- Treasure Valley93.8%
- Unwooded Alkaline Foothills4.4%
- Mountain Home Uplands1.8%
Finding your parcel within Canyon County
The atlas lists 9 cities, towns, townships, and Census communities associated with Canyon County, including Nampa, Caldwell, Star. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Canyon County by land and water
The Census records 16.6 square miles of water within Canyon County, or 2.8% of its total area. That share is close to Canyon County’s 2.8%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Canyon County has 23.1 times the land area of nearby Caldwell city (25.4 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Ada County, Gem County, Owyhee County, Payette County within Idaho. A tract near one of these lines should be matched to the county identifier on its own records.

