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:^[1]

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^[2]
• Death Valley
• Lahontan
• Oregon Lakes
• Oregon & Northern California Coastal
• Southern California Coastal–Baja California
• Sacramento–San Joaquin

Marine ecoregions

• Northern California^[3]
• Southern California Bight