United States Postal Service

Category: Post office in Diamond Bar, California

Address: 1317 S Diamond Bar Blvd, Diamond Bar, CA 91765, USA

Phone: +18002758777

Opening hours

Sunday: Closed

Monday: 9AM–5PM

Tuesday: 9AM–5PM

Wednesday: 9AM–5PM

Thursday: 9AM–5PM

Friday: 9AM–5PM

Saturday: 9AM–2PM

Reviews

Yoda I am

Jun 12, 2022

Avoid, they don’t know their own shipping regulations. You’ll waste your money on international packages. Use a different service.

ramy saad

May 13, 2022

Wish USPS actually listens to their reviewers and do something about the horrible customer service they provide.

Bobbi M

Mar 1, 2022

I don't know why this post office gets such bad reviews. Maybe they've had problems in the past, but the customer service staff in place now is always helpful, kind and professional. I'm usually there a few times a month for various types of mail services and I've never had a problem. Sometimes they get really busy depending on the time day or holiday season, but I either use the kiosk during those times or just try again a different day.

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Questions & Answers

If I want to send a package to GA30329 for next day delivery, how late do I need to drop off my package at Diamond Bar office, Thank you

Kao Yuan Chu | Sep 23, 2021

Jonathan Ro | Sep 23, 2021

For Priority Mail Express this post office recommends drop off by 12:30pm. If you miss that, you can take it straight to the USPS distribution center in City of Industry where drop off for PM Express is about 4pm.

Do you have passport applications

Julie Vazquez | Aug 20, 2019

Deborah D | Aug 20, 2019

Not at diamond bar location.

can mail be delivered to a mail box in front of a property on Rio Lobos rd instead of a cluster set up. The cluster was replace some years ago and is about to fall, we are 85 plus year old and it would be easier getting our mail cormiermoi2014@gmai

Marcel Cormier | Aug 20, 2018

Robert Hernandez | Aug 20, 2018

You can ask your mail carrier and they will let you know if you can do that.

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