This is a list of regions of California, organized by location.

Northern California

Central California

• Central California
• Central Coast (North)
  • Big Sur
  • Monterey Bay
  • Salinas Valley
  • Santa Cruz Mountains
• Diablo Range
• San Joaquin Valley (North)
  • Metropolitan Fresno

Great Basin

• Great Basin
  • Eastern Sierra
    • Owens Valley
  • Tricorner Region/Surprise Valley
    • Modoc Plateau
    • Warner Mountains

North Coast

• North Coast
  • Lost Coast
  • Emerald Triangle
  • Klamath Mountains
  • Mendocino Mountains
  • Humboldt
  • Jefferson

Sacramento Valley

• Sacramento Valley
  • Sacramento Metropolitan Area
  • Yuba-Sutter area
    • Sutter Buttes

Sacramento-San Joaquin River Delta

• Sacramento-San Joaquin River Delta
  • San Joaquin County

San Francisco Bay Area

• San Francisco Bay Area
  • East Bay
    • Oakland–Alameda County
    • Tri-Valley Area
      • Amador Valley
      • Livermore Valley
      • San Ramon Valley
    • Lamorinda
  • North Bay
    • Marin County
      • West Marin
      • Ross Valley
    • Wine Country
      • Napa Valley
      • Russian River Valley
      • Sonoma Valley
    • Telecom Valley
  • The Peninsula
    • City and County of San Francisco
    • San Mateo County
  • South Bay
    • Santa Clara Valley
      • San Jose–Santa Clara County
      • Silicon Valley

Sierra Nevada

• Sierra Nevada
  • Gold Country
  • Lake Tahoe
  • Yosemite

Shasta Cascade

• Shasta Cascade
  • Mount Shasta
  • Redding Area
  • Trinity Alps

Southern California

Central Coast

• Central Coast (South) /Tri-Counties
  • San Luis Obispo Area
    • Five Cities
  • Santa Barbara Area
    • Santa Ynez Valley

Desert Region

• Desert Region
  • Mojave Desert
    • Death Valley
    • High Desert
      • Antelope Valley
      • Morongo Valley
      • Victor Valley
    • Panamint Range
  • Colorado Desert
    • Low Desert
      • Coachella Valley
      • Imperial Valley
        • Calexico–Mexicali
    • Palo Verde Valley
    • Yuha Desert

Inland Southern California

• Inland Empire
  • Cucamonga Valley
  • San Jacinto Valley
  • San Bernardino Valley
    • San Bernardino
      • Downtown San Bernardino
  • Chino Valley
  • Perris Valley
  • San Gorgonio Pass
  • San Bernardino Mountains
  • San Jacinto Mountains
  • Temecula Valley
• San Joaquin Valley (South)
  • Kern County
• Tehachapi Mountains

South Coast

• South Coast
  • Ventura County
    • Oxnard Plain
    • Conejo Valley
      • Thousand Oaks
    • East County- Moorpark, Simi Valley
  • Channel Islands
  • Greater Los Angeles
    • Malibu
    • Los Angeles Basin
      • • Gateway Cities
        • Los Angeles City
          • East Los Angeles
          • Harbor Area
          • Northeast Los Angeles
          • South Los Angeles
          • Westside
          • Silicon Beach
        • Palos Verdes Peninsula
      • South Bay
        • Beach Cities
    • San Gabriel Valley
      • Pomona Valley
      • Puente Hills
    • Crescenta Valley
      • Peninsular Ranges (North)
        • San Jacinto Mountains
        • Santa Rosa Mountains
    • Santa Clarita Valley
    • San Gabriel Mountains
    • San Fernando Valley
    • Santa Monica Mountains
      • Hollywood Hills
    • Orange County Area
      • Santa Ana-Anaheim-Irvine, CA
        • Santa Ana
      • South Coast Metro
    • Santa Ana Valley
    • Saddleback Valley
    • Santa Ana Mountains
  • San Diego–Tijuana
    • San Diego metropolitan area
      • North County
        • North County Coastal
        • North County Inland
        • Temecula Valley
      • East County
        • South Bay
        • Mountain Empire