Sylmar CA zip code information helps residents and visitors navigate addresses, deliveries, and location planning in this neighborhood within Los Angeles. Understanding the exact codes and related details supports smoother daily routines and more accurate location references.
Use this guide to clarify how ZIP codes work in Sylmar, compare nearby areas, and find quick answers to common questions about mail, services, and geography.
| ZIP Code | Neighborhood | County | Time Zone | Area Code |
|---|---|---|---|---|
| 91342 | Sylmar | Los Angeles | Pacific | 747, 818 |
| 91390 | Sylmar (PO Box) | Los Angeles | Pacific | 747, 818 |
Residential Addresses In Sylmar
How to Format Home Mail Delivery
For residential delivery, use 91342 as the primary Sylmar CA zip code. Include this code with the street address to reduce sorting delays and ensure timely arrival of mail and packages.
Post Office And Business Locations
PO Boxes And Commercial Mail Receivers
Some businesses and post office boxes in Sylmar use 91390. When sending official correspondence or larger packages to a business, verify the specific code to avoid misrouting.
Geography And Nearby Boundaries
Mapping Sylmar Within Los Angeles
Sylmar sits in the northeastern San Fernando Valley, and its ZIP code boundaries affect routing and service zones. The area generally extends north from major streets and aligns with local geography such as hills and parklands.
Infrastructure And Service Planning
Utilities, Schools, and Emergency Access
ZIP code 91342 helps utilities and schools organize service plans and allocate resources. Emergency responders also rely on clear ZIP information to locate incidents quickly and efficiently within Sylmar.
Everyday Planning Around Sylmar Zip Code
- Use 91342 as your main ZIP code for home mail and online orders.
- Double-check with businesses if they require 91390 for PO Box deliveries.
- Verify ZIP on shipping labels to avoid delays at local facilities.
- Remember that ZIP codes support routing, not property or school boundaries.
- Keep the area code 747 or 818 in sync with the Sylmar location.
FAQ
Reader questions
Which ZIP code should I use for online orders in Sylmar?
Enter 91342 for standard home delivery in Sylmar. If your building uses a private mailbox or business center, check whether the carrier prefers 91390 instead.
Does the Sylmar ZIP code affect property taxes or school enrollment?
The ZIP code itself does not determine property taxes or school placement, but it helps officials link your address to the correct local jurisdiction and school district within Los Angeles.
Will mail from 91342 ever be routed through a nearby city center?
Yes, depending on carrier routes and volume, outgoing mail from 91342 may be processed at a regional facility in San Fernando or another Los Angeles hub before final local delivery.
Can a business in Sylmar legally use 91390 instead of 91342?
Yes, if the business has a post office box or commercial mail receiving agency assigned 91390, it may legally use that code for mail and packages even though it operates in Sylmar.