Ontario zip code

Zip code in Ontario, CA

The location Ontario belongs to San Bernardino County, state of California. Ontario has 6 zip codes which you can see in the following table.

The location name Ontario is listed as acceptable by the US Postal Service so it can be used in your mailings just fine. You can also use any of the following names: Montclair, Ontario.

Zip code	Type	Population
91710	STANDARD	72,550
91758	STANDARD	0
91761	STANDARD	56,760
91762	STANDARD	56,290
91764	STANDARD	49,450
91798	UNIQUE	0

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