Ontario is a city of California in the United States. It is 35 miles east of downtown Los Angeles.

v t e Greater Los Angeles Area
Central city	Los Angeles
Counties	Los Angeles Orange Riverside San Bernardino Ventura
Cities >200k	Anaheim Fontana Glendale Huntington Beach Irvine Long Beach Moreno Valley Oxnard Riverside San Bernardino Santa Ana Santa Clarita
Cities and towns 100k−200k	Burbank Corona Costa Mesa Downey East Los Angeles El Monte Fullerton Garden Grove Inglewood Jurupa Valley Lancaster Murrieta Menifee Norwalk Ontario Orange Palmdale Pasadena Pomona Rancho Cucamonga Rialto Simi Valley Temecula Thousand Oaks Torrance Ventura Victorville West Covina
Area regions	Antelope Valley Central Los Angeles Downtown Los Angeles Gateway Cities Greater Hollywood Inland Empire Palos Verdes San Bernardino Valley San Fernando Valley San Gabriel Valley
Landforms	Coachella Valley Colorado Desert Mojave Desert San Gabriel Mountains Santa Monica Mountains Santa Susana Mountains
Bodies of water	Los Angeles River Rio Hondo San Juan Creek Santa Ana River Santa Margarita River

v t e Inland Empire
Counties	Riverside San Bernardino
Major cities	Riverside San Bernardino
Cities and towns 100k+	Corona Fontana Jurupa Valley Menifee Moreno Valley Murrieta Ontario Rancho Cucamonga Rialto Temecula Victorville
Cities and towns 25k–100k	Adelanto Apple Valley Banning Barstow Beaumont Cathedral City Chino Chino Hills Coachella Colton Desert Hot Springs Eastvale Hemet Hesperia Highland Indio La Quinta Lake Elsinore Montclair Norco Palm Desert Palm Springs Perris Redlands San Jacinto Twentynine Palms Upland Wildomar Yucaipa
Cities and towns 10k–25k	Big Bear City Bloomington Blythe Calimesa Canyon Lake Crestline Grand Terrace Home Gardens Lake Arrowhead Loma Linda Mead Valley Muscoy Rancho Mirage Valle Vista Woodcrest Yucca Valley
Cities and towns under 10k	Big Bear Lake Cabazon El Cerrito Oak Glen Highgrove Indian Wells Joshua Tree Mentone Needles Romoland San Antonio Heights Wrightwood
Regions	Coachella Valley Cucamonga Valley Elsinore Trough High Desert Morongo Basin Perris Plain Plains of Leon San Bernardino Mountains San Bernardino Valley San Jacinto Mountains San Jacinto Valley Santa Ana Mountains Temecula Valley Temescal Mountains Victor Valley

v t e Municipalities and communities of San Bernardino County, California, United States
County seat: San Bernardino
Cities and towns	Adelanto Apple Valley Barstow Big Bear Lake Chino Chino Hills Colton Fontana Grand Terrace Hesperia Highland Loma Linda Montclair Needles Ontario Rancho Cucamonga Redlands Rialto San Bernardino Twentynine Palms Upland Victorville Yucaipa Yucca Valley	San Bernardino County map
CDPs	Baker Big Bear City Big River Bloomington Bluewater Crestline Fort Irwin Homestead Valley Joshua Tree Lake Arrowhead Lenwood Lucerne Valley Lytle Creek Mentone Morongo Valley Mountain View Acres Muscoy Oak Glen Oak Hills Phelan Piñon Hills Running Springs San Antonio Heights Searles Valley Silver Lakes Spring Valley Lake Wrightwood Yermo
Unincorporated communities	Amboy Angelus Oaks Argus Arrowhead Highlands Arrowbear Lake Arrowhead Farms Baldy Mesa Bell Mountain Blue Jay Bryman Cadiz Cajon Junction Cedar Glen Cedarpines Park Cima Crafton Crest Park Cushenbury Daggett Danby Declezville Earp El Mirage Essex Fawnskin Fenner Forest Falls Goffs Green Valley Lake Guasti Halloran Springs Havasu Lake Helendale Hinkley Hodge Ivanpah Johnson Valley Kramer Kramer Hills La Delta Landers Ludlow Mars Mojave Heights Mount Baldy Mountain Home Village Mountain Pass Newberry Springs Nipton Oro Grande Parker Dam Patton Pioneer Point Pioneertown Red Mountain Rimforest Skyforest Sugarloaf Sunfair Sunfair Heights Trona Twin Peaks Venus Vidal Vidal Junction Wonder Valley Zzyzx
Indian reservations	Chemehuevi Reservation Fort Mojave Indian Reservation‡ San Manuel Reservation Twenty-Nine Palms Reservation Colorado River Indian Tribes‡
Ghost towns	Afton Agua Mansa Atolia Bagdad Barnwell Beal Belleville Calico Calzona Chambless Crucero Hart Ivanpah Kelso Lanfair Milligan Olive City Pasinogna Politana Prado Providence Ragtown Rice Rincon Seventeen Mile Point Siberia Silver Lake Vanderbilt
Footnotes	‡This populated place also has portions in an adjacent county or counties

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