Black Diamond Post Office

25228 Baker St, Black Diamond, WA 98010

Contact Numbers

Phone: 360-886-9429
Fax: 360-886-1337
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours







Lobby Hours
PO Box Access Available

Monday 5:00am - 9:00pm
Tuesday 5:00am - 9:00pm
Wednesday 5:00am - 9:00pm
Thursday 5:00am - 9:00pm
Friday 5:00am - 9:00pm
Saturday 5:00am - 9:00pm
Sunday 5:00am - 9:00pm

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 10:30pm
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 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
  • Burial Flags
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • 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:

Ravensdale
27200 272nd Ave SE
2.2 miles away

Maple Valley
22023 SE Wax Rd
3.7 miles away

Enumclaw
1742 Cole St
4.3 miles away

Enumclaw Carrier Annex
1005 Washington Ave
4.3 miles away

Reviews

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The parking lot/ drive through area is in dire need of fixing. Huge pot hole, it can’t be avoided.
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FOR MONTHS NOW, the ADA feature of the front door of this Post Office in Black Diamond, Wa 98010 has NOT been working. My husband is handicapped in a wheel chair and cannot open the door without the button to push opening the door automatically. We have a PO Box there.
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