Castaic Post Office

28201 Franklin Pkwy Santa Clarita, CA 91383
Phone: 661-775-7166

Parking: Parking Lot Available
Post Office Lobby Hours
Monday 12:01am - 11:59pm
Tuesday 12:01am - 11:59pm
Wednesday 12:01am - 11:59pm
Thursday 12:01am - 11:59pm
Friday 12:01am - 11:59pm
Saturday 12:01am - 11:59pm
Sunday 12:01am - 11:59pm


Castaic Post Office is a United States Postal Service (USPS) facility in Santa Clarita, CA. This post office offers a full array of services, including package delivery and first class mail.


Business Reply Mail® Account Balance
Business Reply Mail New Permit
Burial Flags
Carrier Services
Duck Stamps
Greeting Card Services
Money Orders (Domestic)
Money Orders (Inquiry)
Money Orders (International)
Pickup Hold Mail
Pickup Accountable Mail
Pickup Notice Left Mail
PO Boxes
Priority Mail International®

Passport Services at Castaic Post Office

Castaic Post Office can accept first-time passport applications, and can facilitate passport renewals. You can schedule an appointment at this post office by calling 661-775-7166 or schedule an appointment online using the Online Scheduling Tool. When you go to your appointment to apply for a new passport, you will need to bring the following items with you to the post office:

  1. A completed U.S. Passport Application form (DS-11)
  2. Proof of U.S. Citizenship. You will need to present original physical documentation proving your citizenship status (for example, your birth certificate). In addition, you will need to bring a photocopy of the document.
  3. Proof of Identity. You will need to show, for example, a driver's license. In addition, you will need to bring a photocopy of this identification document.
  4. A recent color photograph (a "passport photo") which must show the front of your face, and be 2x2 inches in size. Castaic Post Office does have passport photo services, and, for a fee, your photo can be taken there.

See this resource from the U.S. Department of State for full instructions on how to apply in person, including the full list of documents that can be used as proof of U.S. citizenship, and the full list of acceptable identification documents.

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