Castroville Post Office

10799 Merritt St, Castroville, CA 95012

Contact Numbers

Phone: 831-633-2636
Fax: 831-633-6252
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 7:00am - 5:00pm
Tuesday 7:00am - 5:00pm
Wednesday 7:00am - 5:00pm
Thursday 7:00am - 5:00pm
Friday 7:00am - 5:00pm
Saturday 7:00am - 4:30pm
Sunday Closed

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 3:30pm
Sunday Closed

Passport Walk-In Hours

Monday Closed
Tuesday 2:00pm - 2:45pm
Wednesday 2:00pm - 2:45pm
Thursday 2:00pm - 2:45pm
Friday 2:00pm - 2:45pm
Saturday Closed
Sunday Closed

Passport Appointment Hours

Monday 9:00am - 2:00pm
Tuesday 9:00am - 2:00pm
Wednesday 9:00am - 2:00pm
Thursday 9:00am - 2:00pm
Friday 9:00am - 2:00pm
Saturday Closed
Sunday Closed

  • Visit our Passport FAQ page for a complete overview of what to bring, what you need to know, and how long it will take.
  • You will need two forms of Identification with copies.
  • A passport quality photo. Available at location.
  • The appropriate application form printed and filled out, and the required fee for applying or renewing.
  • You can find up to date costs, information, and forms at the State Departments Travel Site

*Appointments are required outside of walk-in hours to apply for or renew US Passports. Please Call 831-633-2637 or schedule online.

Bulk Mail Acceptance Hours

Monday 9:00am - 3:00pm
Tuesday 9:00am - 3:00pm
Wednesday 9:00am - 3:00pm
Thursday 9:00am - 3:00pm
Friday 9:00am - 3:00pm
Saturday Closed
Sunday Closed

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Passport Acceptance
  • Passport Photo
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Sure Money
  • Lot Parking
  • Passport Appointment Hours

Visit our Links Page for Holiday Schedule, Change of Address, Hold Mail/Stop Delivery, PO Box rentals and fees, and Available Jobs.

*Please call to verify information. Is anything incorrect? Let us know here

Nearby Post Offices:

Moss Landing
8042 Moss Landing Rd
1.7 miles away

3100 De Forest Rd
3.6 miles away

1011 Post Dr
4.5 miles away

Salinas Mo Finance
1011 Post Dr
4.5 miles away


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We live in the Monte Del Lago area in our mail is being confused with other males we had an important package that was supposed to come and it was never delivered but it showed it came so somebody got the package today we got some mail from a different person yesterday we had a package from somebody else


I want to let you know that this post office give really bad service to the community. Employees need to start doing a better job. I would like to report that they are mixing up letters. We always get letters from other people, then we had to return them to the office. I wonder if then they give it to the right people. We have lost lots of important documents/letters, from W-2s to checks to IDs. When we call them to ask, they just say " we dont have them here". They are not conscious of what they are doing. I do blame them for peoples personal information stolen. Is a legal sue what they need to start doing their job right?


I went in to this office to mail an item and also to get copies of what I sent. They charged me .50 each page. I had 4 pages so the total was $2.00 when I receive the copies they are on recycled paper. I asked the attendant why they did that and her answer was "well those copied are just for you" actually no they are not I needed to sent them to 3 other agencies. HORRIBLE SERVICE!!!!


I agree they all have horrible attitudes. There lazy, inconsiderate and the Managers are just as bad. Non of employees wear mask. It’s filthy in the post office. Bad service !
• Replied to Joanna Gutierrez


PO BOX access hours need to be extended until at least 6pm. It is truly an inconvenience that doors close at 4pm. Most people have a nine to five and it doesn't give the community an opportunity to collect their daily mail, unless it's early on a Saturday. It did not make sense that town's such as Gonzalez which is smaller have longer access/lobby hours, and in the middle of nowhere. You need to pay attention to the demographics and needs of the people of this community. We need to have better access to our bills and other important correspondence. Please fix it.

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