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  2. What is the zip code of Ontario, CA, 91758

Ontario (CA) Zip Code is 91758 Latest Details Jul, 2025

Updated: 08-07-2025

Ontario (CA) zip Code is 91758, Postal Code details. Ontario is located in state CA, United States.

Find Zip Code 91758 Details

ZIP code 91758 is located in Ontario CA in the United States.

Postal Code United States Zip Code 91758 Latest update Ontario, CA
Zip Code / Postal Code 91758

City

Ontario

State Code

CA

County

San Bernardino, United States

Postal Locations

Ontario, CA - Zip Code is - 91758

Postal

United States Postal Service USPS Link

Delivery Type

Package Delivery and first class mail.

The zip code 91758 is an essential part of the postal system in Ontario, CA. Located in a vibrant part of the city, this zip code covers a variety of neighborhoods, offering residents and businesses a unique blend of suburban comfort and urban convenience. Whether you're looking to send mail, relocate, or simply learn more about the area, Ontario has a lot to offer.

FAQ about Zip Code 91758, Ontario, (CA)

What is Zip code Ontario?

Ontario Zip Code: 91758, used by the Ontario Post Office and USPS, is a Zone Improvement Plan code that ensures faster, accurate mail delivery in San Bernardino, CA. Represented by the American Postal Workers Union (APWU), USPS oversees postal operations.

What is Postal code of area Ontario?

Ontario Postal Code is: 91758

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