THE TWIN FALLS COUNTY LAND BRIEF
Land in the
Dissected High Lava Plateau setting.
Twin Falls County has 1,921.7 square miles of land in Idaho. 6 mapped landscape regions meet across Twin Falls County: Dissected High Lava Plateau, Magic Valley, Mountain Home Uplands, among others.
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.
Regional context: Northern Basin and Range ↗ · Regional mapping across the county footprint
Where the landscape changes
Twin Falls County intersects 6 mapped regional units. The largest mapped shares are:
- Dissected High Lava Plateau54.3%
- Magic Valley25.1%
- Mountain Home Uplands9%
- Semiarid Uplands6.1%
- Semiarid Hills and Low Mountains5.3%
Snake River Plain in Twin Falls County
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.
Read the regional source ↗Finding your parcel within Twin Falls County
The atlas lists 8 cities, towns, townships, and Census communities associated with Twin Falls County, including Twin Falls, Kimberly, Buhl. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Twin Falls County by land and water
The Census records 6.97 square miles of water within Twin Falls County, or 0.4% of its total area. That share is close to Twin Falls County’s 0.4%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Twin Falls County has 1,794.3 times the land area of nearby Hollister city (1.07 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Cassia County, Elmore County, Gooding County, Jerome County, Owyhee County within Idaho. A tract near one of these lines should be matched to the county identifier on its own records.

