Ontario, CA Post Offices

Ontario, California has a population of 183,393. According to the 2021 census, the city's 3 post offices serve 49,624 households with a median income of 49,624. The city is located in San Bernardino County and has a land area of 129,425,158 and a water area of 75,071.

Post Office
Address
Phone
Hours
Ontario, CA Post Office 1555 E Holt Blvd, Ontario, California, CA, 91761-9998
909-933-3837
Today 08:30:00 - 17:00:00

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