THE FRANKLIN COUNTY LAND BRIEF
Land in the
Malad and Cache Valleys setting.
Franklin County has 663 square miles of land in Idaho. 5 mapped landscape regions meet across Franklin County: Malad and Cache Valleys, Semiarid Hills and Low Mountains, Semiarid Foothills, among others.
North-trending mountain blocks separate dry interior basins. Alluvial fans connect the ranges to valley floors, while vegetation changes from sparse basin shrubs to woodland and forest at higher elevations.
Regional context: Central Basin and Range ↗ · Regional mapping across the county footprint
Where the landscape changes
Franklin County intersects 5 mapped regional units. The largest mapped shares are:
- Malad and Cache Valleys34.6%
- Semiarid Hills and Low Mountains32.3%
- Semiarid Foothills14.9%
- Wasatch Montane Zone13.2%
- High Elevation Forests and Shrublands4.9%
Northern Basin and Range in Franklin County
Lava plains, stony uplands, dry valleys and scattered ranges form the Northern Basin and Range. Sagebrush and grassland give way to juniper and other woodland in higher or rockier settings.
Read the regional source ↗Wasatch and Uinta Mountains in Franklin County
High, steep mountains and narrow valleys form the core of the Wasatch and Uinta ranges. Woodland, aspen and conifers change with elevation, with dissected plateaus along parts of the margins.
Read the regional source ↗Finding your parcel within Franklin County
The atlas lists 6 cities, towns, townships, and Census communities associated with Franklin County, including Preston, Dayton, Clifton. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Franklin County by land and water
The Census records 4.69 square miles of water within Franklin County, or 0.7% of its total area. That share is close to Franklin County’s 0.7%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Franklin County has 97.1 times the land area of nearby Preston city (6.83 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Bannock County, Bear Lake County, Caribou County, Oneida County within Idaho. A tract near one of these lines should be matched to the county identifier on its own records.

