This is one of the best post offices ive been to! The customer service has always been great, quick and efficient and the workers here are always friendly. read more

No wonder they close a lot of USPS stores out there. They're very slow and the waiting is very long. They're not efficient doing what they're doing. There was this one lady struggling to tape her big box of package and the cashier wasn't doing anything instead of just waiting for her to finish. She should ask her to step aside and helped other customers, such a waste of time! Now, I received a package back in Feb, yes 4 months ago. I've never received any notice until 3 days ago, I got a FINAL notice and when I requested to redeliver online, still, never received it. I went down and asked for my package and they had it. Are you kidding me???? What kind of service is that???? Very disappointing and upsetting. I seriously hope they close stores like this and prefer to go to private USPS in my neighborhood, Cyclone that has MUCH BETTER and FASTER customer service. Thank you, USPS but no, THANK YOU! Hello, Cyclone, you never failed me. read more

This is my neighborhood post office for the past 25 years. Today I go and wait in line for a while get to the counter and then I'm told that only one of the employees can do international so I'm asked to stand on the side and wait for that one since she was helping another customer. The employee handling international was processing so slow spelling every single word three times... After 20 minutes of wait I gave up and left. This is ridiculous. I don't understand why only one person should process international and this is only at this location.This location in general has really bad management. Don't take me wrong good employees, actually really good employees but bad management. read more

Everyone in the Diamond Bar USPS works their behind off - always helpful and friendly even when customers are rude or impatient. Especially during the pandemic this last year - my carrier has gone above and beyond to take care of speedy delivery. Thank you for your service. read more

Not sure if I got lucky, but I had an overall pleasant experience with the employees in the office, so my review is based solely on the service I got at this location. My situation: I was expecting a package on Friday, but for whatever reason, mailman did not deliver it and claimed that there was no secure place to leave it, though I felt like the front door of an apartment complex was completely acceptable. Had a pink slip in my mailbox that offered redelivery that I could register online. I registered for Saturday, because that was the earliest they offered. Saturday rolled around, there were no updates to my tracking, so I had no idea where my package could possibly be. It was just stuck on "In Transit". This absolutely frustrated me because it was a fairly expensive package, I was "promised" a redelivery on the date I asked for yet it did not happen. Researched about this situation online, and it turns out this is fairly common. Rarely does redelivery result in success and is a headache to deal with, so I figured I would take matters into my own hands on Monday. Monday rolls around and I decide to call about the status of my package. I figured the moment they opened would be best because it wouldn't be as busy... also decided to maintain a polite, cheery attitude despite my frustration, because I'm pretty sure post office employees are equally frustrated dealing with so many unhappy customers and situations out of their control. Within 2 rings, someone picked up and the man was very polite to me. I told him my situation, and he transferred me to someone else who was equally polite and patient with my request. She was able to locate my package in the office and offered redelivery or pick up. I chose pick up option, because... quite frankly I will never do redelivery service again lol. Moment I got to post office, I was helped and successfully retrieved my package quickly. I even struck up a conversation with the front desk lady and we joked around a bit. I did not imagine my visit here would end so well, but I definitely left with a good impression. Working at a post office is not the happiest job on earth, I've been to many in my lifetime to know this, so naturally I don't expect employees to be all smiles and excellent customer service when I arrive. And I'm sure they deal with so many unpleasant people on a daily basis. I think if you just try to be as nice as possible despite your frustrations, you will get a friendly response in return. Also, I repeat, NEVER do redelivery service lol. Just pick up your package at the address located on the pink slip! read more

Worst customer service ever!!! I come here once every few months to do return shipment and this past time apparently they don't accept the return item anymore? Or the label? Not sure because the representative was not helpful at all!! She told me to get a new label even thought I explained to her I just printed it before I came... and took the next person while I was still standing there and told me to go figure it out! She expected me to know as if I worked at the post office... never had an issue before until now, I am willing to drive a few extra miles to go the USPS in Walnut now! read more

How does one manage to be rude and have horrible customer service from the first words that come out of the mouth? Terrible. Quick and short response was made by the woman at the counter with no type of willingness to try to help me out further. Horrible demeanor on her part. read more

Whenever I go to USPS, I'm usually only dropping off packages so I generally never really run into issues besides the carrying container being too full. Because of this, my experiences are almost always really good and convenient. Out of my thousands of USPS visits, my average time spent there is probably about 2-3 minutes. Now when I do wait in line for services provided by the employees, I do understand why people have such bad experiences. The wait times are usually abysmal and the service by the employees is always a toss-up. Not to mention their prices are basically unreasonable (shipping prices are one of the worst inflated services out there). My recommendation for customers to have enjoyable experiences at USPS is to use self-service as much as possible! read more

extremely rude staff, not willing to help. USPS would not be my go to shipping anymore with this kind of services and attitude towards your customers and we paid our taxes. read more

We're live in south Diamond Bar. My mail was sent to the wrong address, and I received my neighbor's mail!! This has happened many times.

Recently had to stop by USPS.. I stopped by on Saturday around 10am..customer service was very nice & no wait in line :) Guess Early in the morning is the best time here :) read more

They have picked up my mail from my residence. Mail was literally handed to the mail women a rent check and it was lost. Still to this day never found and they did nothing. Also dropped off a broken cell phone to return and that was lost for over two weeks the manager here barely helped me. It took filling multiple claims and it suddenly was found. read more

Five star because the staff are nice and patient with my shippings at the counter and the wait is very fast. This is favorite post office. I'm sooo glad I just moved here and it is my nearest location. read more

US Post Office - Thank you Diamond Bar P.O. - Post Offices Near Me - Diamond Bar, California

PO box mail is always delivered to the wrong box. I'm always getting my neighbor's mail and I'm guessing my lost mail is in somebody else's box. This is almost as bad as the DMV. read more

Seems like the African American lady who seems to be in charge is the reason people come on here to leave a review. It's why I'm here. I've had it with her and her rudeness. Everyone else that works there is pretty nice but not ever overly friendly. (That's the reason for 2 stars. For the semi-nice postal workers.) If I had to sit next to that cloud of negative energy all day I wouldn't be to happy either. USPS declines with each passing day and I hope UPS and Amazon take their jobs. read more

This review is for 1 particular employee, who everyone hates with a passion! She talks to her coworker and customers with the worst attitude and belittles everyone!! WORST CUSTOMER SERVICE EVER and the this lady is extremely rude!!!!!!! If you ever go in there you will surely know who I am referring to. With multiple altercations with this woman on multiple times over the last five years, why is she still there?? And I don't understand why she stays working there but she clearly hates her job! Today made me so mad I had to write this review. When you say "dropping off, picking up & paying with a card" and I wait 15 minutes to pay with a card and you look at me and tell me the other line because you can only do flat rate shipping you should say "dropping off, picking up & flat rate" Today you weren't even that rude even though your attitude was just shit but I just can not stand you!! read more

To USPS. I can only say if you are not try to improve your service. UPS m, Fedex , Amazon or any carrier for sure will replace you soon. .... I stay at home whole day wait for my package. But you dont even ring the doorbell and just left a note . I input my article number on upsp.com/redelivery . Your stupid web just keeps show : Sorry, there's no information for that Article Number. Please double-check it and try again. ???? What ??? Your 1800-275-8777 never has any one can help. read more

This post office has it's ups and downs. Unlike some of the post offices I have been to, there's no one here to really "assist" you while you are waiting in line. You have to wait in line for every little thing. Even for a question. -_- I would strongly advise you not to come here if: 1. You want to open a PO BOX: Save your time and money. Do it elsewhere! You'll be so disappointed with the service. Every time I'm supposed to receive something there, it gets sent back to the sender. WTF? 2. Hate long lines: If you can't stand waiting in a long line, don't come here. You will wait at least 20 minutes, even if you are 4th in line! 3. Expect great customer service: Quite frankly, I have had my share of good service here, but most of the times, the service really sucks. The women here REALLY hate their job or something. If you land a guy to assist you, you're in luck. 4. Love getting ripped off on fees: So the stupid lady who works here told me a delivery confirmation will cost me $3.99 for sending a letter. WTF is she smoking? I told her it doesn't cost that much and she said it does. Stupid woman. 5. You don't have enough knowledge about fees w/ the Post Office: See #4. If you really don't mind waiting in a longer line and you prefer great service, go to the Rowland Heights Post Office. :) Other than that, it's the USPS. I love that it's conveniently located in Diamond Bar. :) PS - Yes, this location has one automatic machine, but there's a long line for that, too. :) read more

Really boggles my mind how they're unable to deliver mail to the correct unit after years of delivery. Luckily half the time I have good neighbors who return my package after it was delivered to the WRONG address, and once they were able to determine through gps tracking that they misdelivered and we're able to retrieve the package, but seriously, they have ONE JOB. I am astonished that USPS is still in operations. It frightens me when UPS hands off to USPS in the event my package gets lost or delivered to a neighbor. read more

This is by far the slowest post office I've ever been to in my life. How do you have one person working the last hour? There's limited parking and terribly located. I waited in a long line to ship an international package only to be told at the counter, they don't accept international packages after 4:30 pm. I would've made it in that time frame if you didn't just have ONE worker. I wasted my time in a line that was to their gate and gas to get there, to be told I would need to come back tomorrow. If I could give negative stars, I would. This post office messed up a previous package in the past, so I'm never coming back here again. I would NEVER recommend anyone use this post office. Save your energy and go to a post office a little further away. read more

I usually come here only to drop off mail, but who mails much these days when you can do practically everything online? If you only have letters to mail and don't feel like stopping and getting out of your car, this location does have a drive-thru mailbox on the northern end of the parking lot almost to Albertsons. I used to have to come here to collect packages if the postman couldn't reach us to deliver a package that required a signature, but now I just have all of my packages mailed to my work address. So I'm not sure if the lines are long to see a postal worker at the counter. They used to be pretty friendly. read more

Worst customer service ever! I came to this post office for a dog hold on my mail around 4ish in the afternoon. I was next in line and went to a gentleman who was somewhat helpful, he then called to another person to help me out with my problem. Now let me tell you about this lady.. from the start she had the nastiest attitude I've ever experienced from somebody working at a post office. She was so rude and not in anyway helpful to what I was trying to resolve. She was rolling her eyes, throwing a paper she HAD to give me for my mail and asked rudely to see my I.D. She then had another customer trying to get a package and again with her attitude and facial expressions. I work in customer service so I know how it is to work with people, but to work at a customer service job to provide customer service that horrible is unacceptable. This post office needs to train their employees on how to treat the customers that are coming in with questions. Never again will I come back to this location. Period. Btw: if I can give this a negative star I would. read more

This post office is not the place to go if you are in a hurry, especially if you need to use the restroom. Line at this location is always long. The guy with a pony tail is very helpful but he wastes a lot of your precious time because he loves to stamp your box 1000 times. Maybe they should issue him a rolling stamp that says first class so he call roll it around the box and this will save a lot of time. By having this tool, he probably will help out extra 50 customers per day. Best thing about this location is the automatic shipping machine. It's open 24 hours and it's very convenient to use. read more

I didn't receive my package and the package was marked delivered, I called to ask where they put the package, and got transferred around about 3-4 times. After around 5 total phone calls, all transferred to different people, I got this one lady who was really rude, and managed to shout something along the lines of "IF YOU DIDN'T GET YOUR PACKAGE THEN IT MUST BE LOST" and then hung up on me. Worst customer service HANDS DOWN. read more

If you dont get service with their employee，especially their manger，the world would be peacefully！！！

The supervisor at the Diamond bar post office is one rude lady. You could see it on her face. She is not friendly at all. I love my post lady that delivers my mail she is way cool. And she has to walk for miles. The supervisor sits all day. She should do it with a smile and be happy that she has a job because there's a lot of people that don' HAPPY NEW YEAR SUPPRR !! SHE IS STILL MAD read more

Worst customer service each visit and phone call, specifically to female supervisor that works at the front most times I have come. Even asking a simple question is such a chore to these people. Customer service is an obvious part of the job description. If you can't or don't like it, then quit rather than make everyone else feel miserable. Also, I witnessed the delivery lady (has blonde hair with bangs) dropping people's packages haphazardly onto the floor without a care for what's inside. Her excuse when I confronted, in a nice way, was that her hands were full with her keys, phone & satchel. Seriously? She also doesn't like to knock or ring the doorbell when delivering things. Hence why my package was probably delayed bc she didn't bother to look that I gave consent to have my packages left at my door if no one answers. Hopefully a change in attitude and/or staff will happen. On a positive note, I called Chris (the manager) with all of my issues which he listened to, was very polite, & addressed all of my issues. I appreciated it a lot after having spent the morning being frustrated at the rest of the staff. read more

The post office continues to give excellent service and my mail person is soo.... nice and sweet. Since she has taken over the route, I have received 100% of all my packages. read more

Worst place ever. The lady Patrice that works there is the most rude person ever. The only time she was helpful was when her supervisor Darrin was there. We have moved to a new place for 3 months now and still haven't gotten our mail forward for a mistake on the post office's part... I wonder if they will be paying all the incurred late fees. read more

It really depends on the day you come in and who helped you that will determine the service you get. You might be helped by the same person on a different day and get a different result. This locations seems a little understaffed for the size of the location and it is constantly busy. The speed of service is fairly quick it's just the customer service that can lack at times. If I have to ship something out I use a mom and pop down the street but if I have to pick up my mail I come here. Service is just dependent on the day and associate you work with. They are somewhat friendly when helping but can't be over worked it seems. read more

My DoorDash $5 off coupons conspicuously didn't get delivered twice in a row. I can't confirm if they're stolen because I use the codes on the USPS scans as I receive them. read more

I now know why the USPS is in a deep, deep, deficit hole. It's not actually their mail delivery system, no it's their employees. Rather, it's CERTAIN EMPLOYEES. There are great people working at this USPS (my mailman is positively saintly for dealing with the packages I get, and he's always polite too!) and then there are idiots manning their front office. Again, there's great people working there. They just have questionable judgement letting the short, Indian woman stand at the front of the line and attempt to aid people. She doesn't have any customer service skills. Side note: So do you know it's illegal to solicit on federal property? (Solicitation in general is illegal if the owner of the property does not agree. So those people outside Target and stuff? Yeah. You can call the cops on them too.) So there's this family of three--a couple and what I presume is their child hiding behind the pay phone with the mother going, "hi!" to everyone passing by. Anyways, the post office doesn't care. So the cops have to show up and talk with them. read more

Slow like a snail as always. The guy who is helping me is actually playing with his phone. Wtf??? read more

US Post Office - Post Offices Near Me - Diamond Bar, California

This is the worst post office! I keep getting next door neighbor's mail, the same happen to the neighbors on my left & right side! My bank check books never arrived & l would get mail with the same house # but from another street! Called the post office for.10minutes but nobody answered! I'm going to the post office in person to find out which carrier did this! read more

I have to say this place is the best post office. I do come in everyday as I have lots of packages i ship. I noticed a lot of people seem to treat the staff a bit mean. A lot of times, its the customer that doesn't know how shipping works, and some even think its free. I have never seen them treat anyone unfairly. They always tell people to come back to the front once they are done filling out the information needed to ship the package. AS a lot of people come unprepared. Lost packages are not the fault of the People in front. Thank you ladies and gentlemen at the front counter. read more

I had 2 billings (so far) that did not reach the intended parties as sent out last month. This has caused late fees and possibly a lowering of my FICO score. I believe these letters were deposited in the satellite drive by box at the post office, but not sure. This has never happened before but would appreciate cameras installed to watch over the box and view license plates if possible. read more

Shout out to Pat and Patrice ("manager" apparently) for taking the award of being the most incompetent and rude individuals a post office has ever seen. When these two employees aren't at work, this place actually runs pretty smoothly. Save yourself the trouble and go to another post office if you see them. They'll appreciate it too since they're lazy and rather not be working anyways. Nice gig since the union protects them, probably the only job they'd be able to keep with such poor customer service. read more

They are always so nice, especially with a toddler that runs around crazy. Just make sure you utilize all their materials at the desk before going up to the counter. I see alot of people just waiting in the long line, only to end up going to the desk and then trying to cut the line when they're done. You can also go to web site for a lot of their services for cheaper. read more

This place is alright. The workers here are cool, but I rarely show up when it's open. I usually go after hours and send packages through the machine. The only thing I don't like is that they don't keep the priority mail boxes near the machine, so you have to go pick them up when the post office is open or you have to drive all the way to the Chino Hills post office to get them. This place would be more awesome if they had their boxes out after hours near their automated machine. read more

I had a very bad experience with the manager at the Diamond Bar post office named Patrice Yarde. She was very rude . I had a question regarding a letter that was returned to me and I had to place a new stamp and I had to remain it. She wouldn't take it and she wanted me to mail it in the drop off box outside because she said she doesn't want to be blamed if anything happens to it. She should not be working at all at a place like the Post Office. She gives government employees a bad reputation. read more