- Source: List of ecoregions in California
- Wilayah neotropis
- Kepulauan Spratly
- Kepulauan Turks dan Caicos
- List of ecoregions in California
- List of ecoregions in the United States (EPA)
- List of ecoregions in the United States (WWF)
- List of ecoregions in Mexico
- Ecology of California
- California chaparral and woodlands
- Cascades (ecoregion)
- California coastal sage and chaparral
- Klamath Mountains (ecoregion)
- Northern California coastal forests
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