THE MADISON COUNTY LAND BRIEF
Land in the
Dissected Plateaus and Teton Basin setting.
Madison County has 469.3 square miles of land in Idaho. 4 mapped landscape regions meet across Madison County: Dissected Plateaus and Teton Basin, Upper Snake River Plain, Partly Forested Mountains, among others.
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
Madison County intersects 4 mapped regional units. The largest mapped shares are:
- Dissected Plateaus and Teton Basin52.3%
- Upper Snake River Plain24.8%
- Partly Forested Mountains15.4%
- Eastern Snake River Basalt Plains7.4%
Middle Rockies in Madison County
Forested mountain ranges rise above grassy or shrubby intermountain valleys. The Middle Rockies combine alpine high country, partly wooded foothills and valleys supplied by mountain streams.
Read the regional source ↗Finding your parcel within Madison County
The atlas lists 2 cities, towns, townships, and Census communities associated with Madison County, including Rexburg, Sugar City. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Madison County by land and water
The Census records 4.05 square miles of water within Madison County, or 0.9% of its total area. That share is close to Madison County’s 0.9%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Madison County has 45 times the land area of nearby Rexburg city (10.4 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Bonneville County, Fremont County, Jefferson County, Teton County within Idaho. A tract near one of these lines should be matched to the county identifier on its own records.

