THE LOS ANGELES COUNTY LAND BRIEF
Land in the
Los Angeles Plain setting.
Los Angeles County has 4,060.3 square miles of land in California. 13 mapped landscape regions meet across Los Angeles County: Los Angeles Plain, Southern California Lower Montane Shrub and Woodland, Western Mojave Basins, among others.
Coastal and alluvial plains alternate with low hills in southern California. Sage scrub, chaparral and oak communities characterize the region's natural coastal landscape.
Regional context: Southern California/Northern Baja Coast ↗ · Regional mapping across the county footprint
Where the landscape changes
Los Angeles County intersects 13 mapped regional units. The largest mapped shares are:
- Los Angeles Plain23.3%
- Southern California Lower Montane Shrub and Woodland22%
- Western Mojave Basins21.1%
- Venturan-Angeleno Coastal Hills14.7%
- Arid Montane Slopes5.6%
Southern California Mountains in Los Angeles County
Southern California's higher mountains support chaparral, oak woodland and conifer stands. Elevation and slope direction produce distinct vegetation patterns across these Mediterranean-climate ranges.
Read the regional source ↗Mojave Basin and Range in Los Angeles 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 ↗Finding your parcel within Los Angeles County
The atlas lists 142 cities, towns, townships, and Census communities associated with Los Angeles County, including Los Angeles, Palmdale, Lancaster. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Los Angeles County by land and water
The Census records 689.2 square miles of water within Los Angeles County, or 14.5% of its total area. That share is close to Los Angeles County’s 14.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Los Angeles County has 133.2 times the land area of nearby Glendale city (30.5 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Kern County, Orange County, San Bernardino County, Ventura County within California. A tract near one of these lines should be matched to the county identifier on its own records.

