List of ecoregions in California

This is a list of ecoregions in California.

Terrestrial ecoregions
California is in the Nearctic realm. Ecoregions are listed by biome:

Temperate coniferous forests

 * Eastern Cascades forests (Eastern Cascades Slopes and Foothills)
 * Great Basin montane forests
 * Klamath–Siskiyou forests (Klamath Mountains)
 * Northern California coastal forests
 * Sierra Nevada forests

Temperate grasslands, savannas, and shrublands

 * California Central Valley grasslands

Mediterranean forests, woodlands, and shrub

 * California coastal sage and chaparral
 * California interior chaparral and woodlands
 * California montane chaparral and woodlands

Deserts and xeric shrublands

 * Great Basin shrub steppe
 * Mojave Desert
 * Snake–Columbia shrub steppe
 * Sonoran Desert

Freshwater ecoregions

 * Colorado
 * Death Valley
 * Lahontan
 * Oregon Lakes
 * Oregon & Northern California Coastal
 * Southern California Coastal–Baja California
 * Sacramento–San Joaquin

Marine ecoregions

 * Northern California
 * Southern California Bight