Castaic, CA ZIP Codes & Directory
Castaic is located in Los Angeles County in California. Browse all active 5-digit USPS ZIP codes serving Castaic and surrounding Los Angeles County delivery districts.
All ZIP Codes in Castaic, CA
1 CodesAbout Castaic Mail Delivery & Postal Administration
ZIP codes in Castaic are administered by the United States Postal Service. Delivery routes are coordinated through regional Sectional Center Facilities (SCFs) servicing Los Angeles County and surrounding California metropolitan districts.
Frequently Asked Questions About Castaic, CA ZIP Codes
How many ZIP codes serve Castaic, California? ▾
Castaic, California is served by 1 active USPS postal delivery codes: 91384.
What county is Castaic located in? ▾
Castaic is an incorporated city located within Los Angeles County, California.
What is the population and demographic size of Castaic? ▾
According to official U.S. Census Bureau data, Castaic has an estimated population of 28,585 residents and is situated within the undefined.
How does mail sorting and delivery work in Castaic? ▾
Mail delivery in Castaic is operated by the United States Postal Service (USPS) through regional Sectional Center Facility (SCF) distribution plants servicing Los Angeles County and surrounding California counties.
How much does it cost to ship a package to Castaic, CA? ▾
Shipping costs to Castaic depend on the package weight, dimensions, shipping carrier (USPS, UPS, FedEx), and the distance from the origin ZIP code. To calculate exact postage rates, use our shipping cost estimator tool.
What is the standard delivery time for mail to Castaic? ▾
Standard USPS Ground Advantage typically takes 2-5 business days to reach Castaic, depending on the origin. Priority Mail generally arrives in 1-3 business days. Please check tracking for specific regional routing times.