Ontario is a city in San Bernardino County, California. It is the fourth most populous city in the county and is home to the LA/Ontario International Airport. It has an approximate population of 175,800 people, with the median sales price for a home being $444,000.

Ontario is bordered by Montclair (NW), Upland (N), Jurupa Valley (E), Chino and Eastvale (S), and Pomona (W). Residents of Ontario are served by the Ontario-Montclair School District.
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