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  2. What is the zip code of Castaic, CA, 91310

Castaic (CA) Zip Code is 91310 Latest Details Jul, 2025

Updated: 07-07-2025

Castaic (CA) zip Code is 91310, Postal Code details. Castaic is located in state CA, United States.

Find Zip Code 91310 Details

ZIP code 91310 is located in Castaic CA in the United States.

Postal Code United States Zip Code 91310 Latest update Castaic, CA
Zip Code / Postal Code 91310

City

Castaic

State Code

CA

County

Los Angeles, United States

Postal Locations

Castaic, CA - Zip Code is - 91310

Postal

United States Postal Service USPS Link

Delivery Type

Package Delivery and first class mail.

The zip code 91310 is an essential part of the postal system in Castaic, 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, Castaic has a lot to offer.

FAQ about Zip Code 91310, Castaic, (CA)

What is Zip code Castaic?

Castaic Zip Code: 91310, used by the Castaic Post Office and USPS, is a Zone Improvement Plan code that ensures faster, accurate mail delivery in Los Angeles, CA. Represented by the American Postal Workers Union (APWU), USPS oversees postal operations.

What is Postal code of area Castaic?

Castaic Postal Code is: 91310

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