THE JEROME COUNTY LAND BRIEF
Land in the
Eastern Snake River Basalt Plains setting.
Jerome County has 597.5 square miles of land in Idaho. 2 mapped landscape regions meet across Jerome County: Eastern Snake River Basalt Plains, Magic Valley.
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
Jerome County intersects 2 mapped regional units. The largest mapped shares are:
- Eastern Snake River Basalt Plains51.3%
- Magic Valley48.7%
Finding your parcel within Jerome County
The atlas lists 3 cities, towns, townships, and Census communities associated with Jerome County, including Jerome, Hazelton, Eden. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Jerome County by land and water
The Census records 4.98 square miles of water within Jerome County, or 0.8% of its total area. That share is close to Jerome County’s 0.8%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Jerome County has 1,915.2 times the land area of nearby Eden city (0.31 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Cassia County, Gooding County, Lincoln County, Minidoka County, Twin Falls County within Idaho. A tract near one of these lines should be matched to the county identifier on its own records.

