Berikut adalah daftar region di California, disusun menurut lokasi.

• Northern California (California Utara)
  • Central California
    • Central Coast (North)
      • Big Sur
      • Monterey Bay Area
      • Salinas Valley
      • Santa Cruz Mountains
  • Central Valley (North)
    • Sacramento Valley
      • Chico Area
      • Greater Sacramento
      • Yuba-Sutter Area
        • Sutter Buttes
    • Sacramento-San Joaquin River Delta
    • San Joaquin Valley (North)
      • Metropolitan Fresno
      • Merced Area
      • Modesto Area
      • Stockton Area
  • North Coast
    • Lost Coast
      • Emerald Triangle
    • Klamath Mountains
    • Mendocino Mountains
  • San Francisco Bay Area (Wilayah Teluk San Francisco)
    • East Bay
      • Oakland–Alameda County
      • Tri-Valley Area
        • Amador Valley
        • Livermore Valley
        • San Ramon Valley
    • North Bay
      • Marin County
      • Wine Country
        • Napa Valley
        • Russian River Valley
        • Sonoma Valley
      • Telecom Valley
    • San Francisco Peninsula (= 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
    • Gold Country
    • Lake Tahoe
    • Yosemite
  • Shasta Cascade
    • Mount Shasta
    • Redding Area
    • Trinity Alps
  • Tricorner Region/Surprise Valley
    • Modoc Plateau
    • Warner Mountains
• Southern California (California Selatan)
  • Central Coast (South) /Tri-Counties
    • San Luis Obispo Area
      • Five Cities
    • Santa Barbara Area
    • Ventura Area
      • Oxnard Plain
  • Central Valley (South)
    • San Joaquin Valley (South)
      • Bakersfield Area
      • Visalia-Porterville Area
  • Channel Islands
  • South Coast
    • Greater Los Angeles
      • Los Angeles Basin
        • • Gateway Cities
          • Los Angeles City
            • East Los Angeles
            • Harbor Area
            • South Los Angeles
            • Westside
          • Palos Verdes Peninsula
        • South Bay
          • Beach Cities
        • Conejo Valley
        • San Gabriel Valley
      • Crescenta Valley
        • Peninsular Ranges (North)
          • San Jacinto Mountains
          • Santa Rosa Mountains
        • Pomona Valley
      • Puente Hills
      • 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
        • East County
        • South Bay
        • Mountain Empire
  • Desert Region
    • Eureka Valley
    • Ivanpah Valley
      • Antelope Valley
      • Rainbow Basin
      • Saline Valley
    • Riverside-San Bernardino (Inland Empire)
      • Death Valley
      • Mojave Desert (High Desert)
        • Victor Valley
        • Morongo Basin
      • Coachella Valley (Palm Springs Area)
      • West Valley Region
        • Cucamonga Valley
        • Chino Valley
      • Big Cities Region
        • San Bernardino Area
        • Riverside Area
        • San Bernardino Valley
        • San Jacinto Valley
      • Mountain Areas
        • San Bernardino Mountains
        • Little San Bernardino Mountains
    • Imperial Valley
      • El Centro metropolitan area
      • Sonoran Desert (Low Desert)
        • Colorado Desert
          • Salton Sink/Salton Sea
    • Owens Valley

• Daftar region di Amerika Serikat