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9AM - 12PM 1 - 4:30PM
1701 El Nido Ct, Diablo
Post Offices
“Hey! If this is your flag which I think it is because of POW flag, is time to change it. The flag is split into two and that's a nono. Jun 2025, two months later on a visit, new flag, thank you.”
“I don't mind going to this post office especially since I live so close. I can't say I haven't had my share of problems with them, but it is the post office and sometimes thats to be expected. Generally when I go I'm in and out as opposed to other larger ones. I wish parking was better, but downtown Clayton is pretty small”
“I never thought I would give a USPS location a high rating, 'til I came to this one. They're so friendly and helpful. I was trying to mail a couple of packages and surprised by the cost going to the other coast. I didn't even say anything but the lady there was so nice asked what it was and offered me cheaper mailing options. She even gave me the supplies to repack my packages. And I saw them even offer tape to help someone seal their package better. Can I just say Wow, that's so nice! Usually you get someone very moody behind the counter at other locations that would tell you to buy your own tape. This location is a USPS gem.”
“i completely forgot my old school id two days ago when i picked up my package and i just got it in the mail today! i didn’t even hit anybody up for it! a+ customer service thank you very much”
“My husband and I just received such high quality service it honestly amounted to concierge level service from Ali who processed our expired passport renewal. We arrived without an appointment (you can make an appointment but they will try to serve you if they can even without an appointment,) Ali took our photos, processed the forms and in ten minutes at most, we were all set and out the door. Best of all was Ali’s professionalism and friendly attitude.
UPDATE: On the above review and an added exceptional experience. We applied for our US Passport renewals with Ali at Alamo USPS on July 15, 2025. We received our new Passports Aug 13 and 15, 2025. Great service time.
On Aug 15, 2025, I took my 95 year old aunt in for passport renewal of her expired passport. Ali helped us. His patience and professionalism were superb. Great staff at Alamo, USPS office.”
“Ruth was very kind and helpful here! She's an excellent employee. She saved me $50 today by finding a spare box in the back so that I didn't have to use the XL size they had in stock. The XL would have cost $74 (and was too big for the stuff I had to ship), but the box she found only cost me $24 to ship. Thank you Ruth!”
“Went during lunch on a random Tuesday and they had 3 people working which made the process very fast.
Also got tips from the clerk on priority mail which was very helpful!”
“Ok so update. Although I didn't get a call the driver came back and showed a worker where they left the package. I definitely got my delivery thank you so much for going out the way to come back.”
“They don't answer the phone because they don't have one here unfortunately, they have really long lines, and the only good thing about this office is they are helpful and are nearby where I live so I can send packages”
“This is a great post office! It's unfortunate that their reviews don't reflect it.The staff is always incredibly helpful. And they have a lot of patience in dealing with helping people with their packaging. I've never seen a look of contempt from any of them. In fact the opposite. 5 Huge ? ? ? ? ?”
9AM - 5PM
2121 Meridian Park Blvd, Concord
Post Offices
“Passports! I had to get passport renewals for minors, and that can only be done in person. It was impossible to get an appointment anywhere, but they do walk-in passport applications here!!!
Here is what I learned and my pro tips:
-walk-in appointments MWF 9-10am ONLY
-They only take the first 20 people… (I don’t know if that’s actually just the first 20 passport, but I don’t think it’s groups)
-If you’re number 21, you’re gonna have to come back another day
-If you wanna make sure you are in that first 20, you need to get your rear end there *** early*** (the line was about 30 people along by 8:30 AM today)
-don’t think that you can show up at 9 AM and be fine, at least not at this time of year
-Come with everything already completed
-Use black ink only
-Better yet fill out your application online and print it out
-Don’t worry about passport pictures, they take them there and charge $15
-They take check or debit card for passports. No credit cards.
-They’re strict and very busy, so bring your patience, be polite and be humble to their process
-if you are eligible to renew by mail, just do it and save yourself the hassle
The lady that helped me was very down to business, but awesome! I think this post office is great, they’re all nice and helpful.”
“I've been to this office 2 times and always have stellar service from the staff. April has exceeded my expectations in both of my visits and has been patient with answering any additional questions I've had. In my visits, I only had a small piece of mail to send out, nothing too complicated, so didn't think much of what experience I'd get when being helped. I was thoroughly impressed and was greeted with the utmost hospitality. April is good at her job and making sure it is done right. She welcomed me to visit the office again and I'd gladly take the offer when I'm in the area with a mail errand.”
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“Great experience at the USPS Diablo location! This charming, historic post office is nestled between golf courses in a peaceful country club setting. I had a passport appointment and was in and out in 10 minutes. No lines, and the staff member was friendly, efficient, and even took my photo on-site. It's a small post office with just one staff member, but everything ran smoothly. Hidden gem for passport services!”