Clayton Post Office

6150 Center St, Clayton, CA 94517

Contact Numbers

Phone: 925-672-4337
Fax: 925-672-6170
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 24 hours
Tuesday 24 hours
Wednesday 24 hours
Thursday 24 hours
Friday 24 hours
Saturday 24 hours
Sunday 24 hours

Last Collection Times

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

Passport Appointment Hours*

Monday 10:00am - 3:00pm
Tuesday 10:00am - 3:00pm
Wednesday 10:00am - 3:00pm
Thursday 10:00am - 3:00pm
Friday 10:00am - 3:00pm
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

*An appointment is required to apply for or renew US Passports. Please Call or schedule online.

Bulk Mail Acceptance Hours

Monday 10:00am - 2:00pm
Tuesday 10:00am - 2:00pm
Wednesday 10:00am - 2:00pm
Thursday 10:00am - 2:00pm
Friday 10:00am - 2:00pm
Saturday Closed
Sunday Closed

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • Burial Flags
  • 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)
  • Packaged Stamps
  • Passport Acceptance
  • Passport Photo
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • 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:

Casa Correo
4494 Treat Blvd
2.5 miles away

Atlantic Plaza
296 Atlantic Ave
3.2 miles away

Ygnacio Valley
2244 Oak Grove Rd
3.3 miles away

Bay Point
646 Port Chicago Hwy
3.9 miles away


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Overall, I am pleased with the service, however, our Federal Government IRS tax refund check (although correctly mailed to us c/o our post office box, was returned to the IRS and noted as 'undeliverable.' Now I am trying to deal with the Internal Revenue Service. How can something sent to your post office box at your local post office (a p.o. box address that you have had for some 15 years) be 'undeliverable?' A replacement check is finally on the way - I can hope that the Post Master has fixed this rather unfortunate situation! RGJW.


Clayton postmaster, the is the second time I've seen Trump Supporters set up in front of your building. According to your own Federal Rules, this is not allowed. I hope this is the last time I have to see such a disgusting display, representing the destruction of my Democracy! Shame on you!


It says appointment is required by calling. But no one picks up the phone in this location.

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