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 24 hours
Tuesday 24 hours
Wednesday 24 hours
Thursday 24 hours
Friday 24 hours
Saturday 24 hours
Sunday 24 hours

Last Collection Times

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

Passport Walk-In 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

All applications accepted, but processing is limited. 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

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
  • Lot Parking

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

323 N Turner Ave
1.4 miles away

333 E Arrow Hwy
1.8 miles away

Plaza Center
1126 N Mountain Ave
2.1 miles away


*Comments below are not read by postal employees. Please do not post personal information.

*By clicking Submit, you agree to our Privacy Policy & Terms of Use.


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.




Received a Hold Mail. Been calling since 9am to resolve no answer. Please help! This is a business and we never moved.


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


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?


According to my tracking number, my package was last at this post office on 4/21/20. Today is 6/6/20. Insane.


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


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?


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! .


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-


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.

*postallocations.com is not a part of, or affiliated with, the official United States Postal Service (USPS).