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1317 S Diamond Bar Blvd
Diamond Bar, CA 91765
Visit your local Post Office™ at 1317 S Diamond Bar Blvd to find everything you need to send mail and ship packages. Explore our other products and services like money orders, Post Office™ boxes, passports, gift cards, and more
USPS is hiring! See openings for top jobs.

Reviews

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2.0115 reviews
Photo of Stevin F.
Stevin F.
12/10/2025

This location is always so busy, I typically come in once a week to drop off packages and parking can be tricky. Drivers are not conscious of the lanes or the entrances and exits. When I go...

Photo of Melinda D.
Melinda D.
12/8/2025

Warning I don't know why but they paddle locked the postal boxes you can't even drive through and use the drop off It's locked so forewarning before you go there you'll know you have to park...

Photo of Crystell C.
Crystell C.
9/25/2025

This is my go to post office! Keisha is always so welcoming and sweet! They work so hard and always have smiles on their faces! Sometimes they are alone so it's important to be patient and give...

Photo of Vince A.
Vince A.
2/24/2025

I wish I could only say good things about this post office, but I noticed recently that the post box area/with access to package drop offs is no longer accessible on Sundays, and possibly closed...

Photo of Marisol F.
Marisol F.
10/8/2024

This place is always busy , that why I do drop off. The workers was helpful. The place has spacious parking with handicap spaces . Not service requested since I as dropping off only .

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