THE PINAL COUNTY LAND BRIEF
Land in the
Arizona Upland/Eastern Sonoran Basins setting.
Pinal County has 5,366.7 square miles of land in Arizona. 10 mapped landscape regions meet across Pinal County: Arizona Upland/Eastern Sonoran Basins, Gila/Salt Intermediate Basins, Arizona Upland/Eastern Sonoran Mountains, among others.
Hot desert basins are separated by low mountain ranges. Palo verde, cacti and other drought-adapted plants distinguish the Sonoran setting from the Mojave region farther north.
Regional context: Sonoran Basin and Range ↗ · Regional mapping across the county footprint
Where the landscape changes
Pinal County intersects 10 mapped regional units. The largest mapped shares are:
- Arizona Upland/Eastern Sonoran Basins29.2%
- Gila/Salt Intermediate Basins22.4%
- Arizona Upland/Eastern Sonoran Mountains19.8%
- Apachian Valleys and Low Hills8.3%
- Middle Gila/Salt River Floodplains8.3%
Madrean Archipelago in Pinal County
The Sky Islands are isolated mountain ranges rising above desert and grassland basins. Oak-juniper woodland and higher pine forests create sharp ecological transitions with elevation.
Read the regional source ↗Arizona/New Mexico Mountains in Pinal County
These southwestern mountain ranges rise above surrounding deserts and grasslands. Pinyon-juniper and oak woodlands give way to ponderosa pine, with colder forest types limited to the highest areas.
Read the regional source ↗Finding your parcel within Pinal County
The atlas lists 44 cities, towns, townships, and Census communities associated with Pinal County, including Marana, Eloy, Casa Grande. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Pinal County by land and water
The Census records 8.01 square miles of water within Pinal County, or 0.1% of its total area. That share is close to Pinal County’s 0.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Pinal County has 1,964.4 times the land area of nearby Cactus Forest CDP (2.73 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Gila County, Graham County, Maricopa County, Pima County within Arizona. A tract near one of these lines should be matched to the county identifier on its own records.

