Diamond Post Office

1517 S Greenville St, Santa Ana, CA 92704

Contact Numbers

Phone: 714-545-1716
Fax: 714-545-2958
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 8:00am - 5:00pm
Tuesday 8:00am - 5:00pm
Wednesday 8:00am - 5:00pm
Thursday 8:00am - 5:00pm
Friday 8:00am - 5:00pm
Saturday Closed
Sunday Closed

Last Collection Times

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

*This facility does not process US Passports applications or renewals. Check nearby locations below.

  • Burial Flags
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Packaged Stamps
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Sure Money
  • Street Parking

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:

1620 W 1st St
0.8 mile away

Fountain Valley
17227 Newhope St
1.3 miles away

Santa Ana Window Svcs
3101 W Sunflower Ave
1.3 miles away

1609 N King St
1.3 miles away


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I see a lot of negative reviews below, but every time I have had to pick up a package, everyone I have dealt with has always been extremely helpful and nice. I appreciate all you essential workers - thank you for your service!


I came over to the Post Office because I was missing a mail key for our condominium. When I asked about the process, the mail clerk at the front desk was rude and obnoxious with me and treated me like I was beneath him. I can tell by the way someone treats me by how arrogant they are. I left the post office angry and disillusioned about how horrible humanity really is. This guy is miserable and I hope no one is treated the way I was.


This place is terrible! They are constantly losing my certified mail and changed my address when I never put in a change of address! And the supervisors are super rude and disrespectful and don't care if they lost your mail! This place needs to be shut down permanently!

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