Ontario Post Office

NOTICE: The Postal Service is an essential government service, and will remain open wherever possible.

1555 E Holt Blvd, Ontario, CA 91761

Contact Numbers

Phone: 909-933-3837
Fax: 909-988-4023
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours







Lobby Hours
PO Box Access Available

Monday 6:30am - 8:00pm
Tuesday 6:30am - 8:00pm
Wednesday 6:30am - 8:00pm
Thursday 6:30am - 8:00pm
Friday 6:30am - 8:00pm
Saturday 8:00am - 4:00pm
Sunday Closed

Last Collection Times

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

Passport Appointment Hours*

Monday 9:00am - 3:00pm
Tuesday 9:00am - 3:00pm
Wednesday 9:00am - 3:00pm
Thursday 9:00am - 3:00pm
Friday 9:00am - 3:00pm
Saturday Closed
Sunday Closed

Routine processing has resumed. Please see State Department Response to COVID-19 webpage for more information.
  • Visit our Passport FAQ page for a complete overview of what to bring, what you need to know, and how long it will take.
  • You will need two forms of Identification with copies.
  • A passport quality photo. Available at location.
  • The appropriate application form printed and filled out, and the required fee for applying or renewing.
  • You can find up to date costs, information, and forms at the State Departments Travel Site

*An appointment is required to apply for or renew US Passports. Please Call or schedule online.

Bulk Mail Acceptance Hours

Monday 9:00am - 12:00pm, 1:00pm - 4:00pm
Tuesday 9:00am - 12:00pm, 1:00pm - 4:00pm
Wednesday 9:00am - 12:00pm, 1:00pm - 4:00pm
Thursday 9:00am - 12:00pm, 1:00pm - 4:00pm
Friday 9:00am - 12:00pm, 1:00pm - 4:00pm
Saturday Closed
Sunday Closed

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • Burial Flags
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Passport Acceptance
  • Passport Photo
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Sure Money
  • Lot Parking
  • Passport Appointment Hours

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:

Downtown Ontario
123 W Holt Blvd
1.3 miles away

Guasti
323 N Turner Ave
1.4 miles away

Upland
333 E Arrow Hwy
1.8 miles away

Plaza Center
1126 N Mountain Ave
2.1 miles away

Reviews

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I ordered an item on eBay back in March 2021. My item was received in your facility on March 22nd 2021. According to the email I received a package is still pending acceptance. As this information hasn't changed in a few days am I ever going to receive my package?? The tracking number is 9400-1111 0840 0400-535-325 Thank you
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I ordered a package that arrived at this post office feb 12. Its still pending acceptance. Why is it your workers arent scanning and sending out packages. I have been waiting almost a month. Are they stealing them or what. Not acceptable. Please ship my package. Whats the hold-up
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Is your postman stupid? Don’t ask who is in the car, forget my home mailbox and put a piece of paper 10fy away from the mailbox and still not deliver the letter to my home. I’ve lived here for so many years. It’s the first time I see such a person who can’t get out of the car to deliver the letter. Do you have to sit in the car and deliver what I want your postman to do? Our family hasn’t received a letter for a week, you’re ridiculous
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Your postal carriers are either ignorant or stupid? Which is it i ask myself! Everyday your mail carrier delivers my mail to humboldt when in fact i have lived on glenn street since 1963!! Today i received mail for the people on humboldt! Now it's my job to deliver their mail? I guess so since are mail carriers can't read bold letters! The mail carrier i had last year never a issue but since O.P. S. Keeps changing carriers everyone seems to be stuck on stupid!!
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Please! No one is answering the phone! This is a business and we are not receiving our mail! We have been here for almost 30 yrs. and are still open! it is imperative we receive our mail. We are a small company and depend on the checks we should be receiving in the mail. WHY AREN'T WE RECEIVING OUR MAIL???
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Shipped a package to a business address and they tried delivering it at 7pm and claimed that they didn't have access to delivery location which the mailboxes are accessible. Re-delivered the very next day and the receiver walked over to his mailbox and nothing. Now I can't get a hold of anyone at the Post Office!!! This place SUXS!!!!!
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Ontario Post Office I am receiving a package at a Business. Today is Tuesday. Friday the Package was delivered at 5:57 PM (We Close at 4:00pm) Saturday Delivered at 10am (We aren't open on Saturday) Monday again delivered at 5:57 PM I can't figure out why they don't have it delivered with our normal mail that is usually delivered at 3:00PM. Will I ever receive my package. Are they mentally challenged?
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Mail is on vacation hold and they continue to deliver the mail. I can see the delivery with my security cameras. Tried to call but they never answer. It’s disgraceful they just keep shoving mail in a full box and no logical thinking that something is wrong.
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NOBODY ANSWERS THE PHONES!!! DONT BOTHER CALLING
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Not true! They do answer the phone . But you need to be patient and call approximately 5 to 6 times before they answer the phone. I am not saying that this is the appropriate way to service to their customers but let's not spread lies about the USPS. I've called the Ontario California USPS many times and every time I call I call five to six times and they do pick up the phone and you can speak to a live person
• Replied to Luis Becerra

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Received a Hold Mail. Been calling since 9am to resolve no answer. Please help! This is a business and we never moved.
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I need to know why we are not receiving or being able to sent out our mail this is a business and is important to get our mail on time, we did not get any mail on Monday the 13th and today is almost 4 and the mail man is not here. We been having issues for the past two weeks please let us know what is the problem Thank you
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Hi, according to my tracking number you have my package. I have been waiting for that since June 6, we are June 9 and it does not arrive. what's going on?
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According to my tracking number, my package was last at this post office on 4/21/20. Today is 6/6/20. Insane.
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My package was received @ the Ontario USPS on May 11/2020.. today May 27/2020 it's still there.....why....Can you deliver my now very late birthday gift....Any action is appreciated...God Bless and stay safe
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This postal service is absurd, I understand that the pandemic is causing a delay on deliveries but it seems like no ones working here at all! I live in the NJ and I’m waiting on my packaged to be shipped to my home, however ONTARIO, CA USPS SERVICES HASN’T SHIPPED MY PACKAGE YET. This area is holding my items since APRIL 23,2020 AND ITS NOW MAY 22,2020!!!! I feel bad for the business that shipped my item out, it’s not THERE FAULT. I cant drive to CA and pick up my package, I live in NJ. What are they possibly doing for my package to take so long to be shipped to the next carrier . Horrible service. Just horrible. is anybody working?
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I had to 5" square packages in my mailbox today right at the front of the box for the postal worker to take them. Could NOT be missed. At 5:30pm I checked my mail and they had pushed my packages to the back of the box to put new mail in. There is no way they could have missed the two boxes because they toke up half the box and were in the front because I had checked them a few hours earlier to see if the mail had came yet. They had to be postmarked today so I got in my car and went to the Chino post office on Walnut which is closest to my home. I was lucky a truck was just pulling in the back of that post office and I was able to flag him down and he was very friendly and toke the boxes for me .I know it was not my regular postal worker I have had for years because she does a great job and would never have pushed them to the back! .
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hello - we have reached out multiple times since august of 2017 to resolve an issue that in the Ontario mills shopping center new mailboxes were added last year however our store was skipped- our address for Camille La Vie is space 622- there is no space 622 and we have not received our mail for six months- we have contacted Lori Briscoe with no response- our store has called you as well as the mall management office to NO RESPONSE- this is an aggravating situation that has gone on for close to a year-
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I have a package that has been in the Toronto sort facility since 7/8/15 going to Fred Musial Pacesetter Petroleum (tracking number CV 035 461 800 US) Can you please tell me the status of this package. Our customer is calling wondering when and if it will be delivered. Thanks for your assistance.
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