THE RIVERSIDE COUNTY LAND BRIEF
Land in the
Central Sonoran/Colorado Desert Basins setting.
Riverside County has 7,209 square miles of land in California. 19 mapped landscape regions meet across Riverside County: Central Sonoran/Colorado Desert Basins, Eastern Mojave Low Ranges and Arid Footslopes, Central Sonoran/Colorado Desert 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
Riverside County intersects 19 mapped regional units. The largest mapped shares are:
- Central Sonoran/Colorado Desert Basins24%
- Eastern Mojave Low Ranges and Arid Footslopes11.4%
- Central Sonoran/Colorado Desert Mountains10.5%
- Inland Valleys8.8%
- Inland Hills8.6%
Mojave Basin and Range in Riverside County
Broad dry basins and scattered ranges define the Mojave landscape. Creosote scrub, yuccas and Joshua trees occur regionally, with different plant communities on alkali flats and higher mountains.
Read the regional source ↗Southern California/Northern Baja Coast in Riverside County
Coastal and alluvial plains alternate with low hills in southern California. Sage scrub, chaparral and oak communities characterize the region's natural coastal landscape.
Read the regional source ↗Finding your parcel within Riverside County
The atlas lists 75 cities, towns, townships, and Census communities associated with Riverside County, including Palm Springs, Riverside, Sage. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Riverside County by land and water
The Census records 93.7 square miles of water within Riverside County, or 1.3% of its total area. That share is close to Riverside County’s 1.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Riverside County has 241 times the land area of nearby Coachella city (29.9 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Imperial County, Orange County, San Bernardino County, San Diego County within California. A tract near one of these lines should be matched to the county identifier on its own records.

