Union City Post Office

33170 Alvarado Niles Rd, Union City, CA 94587

Contact Numbers

Phone: 510-471-1180
Fax: 510-471-0306
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 Appointment Hours*

Monday 9:00am - 2:00pm
Tuesday 9:00am - 2:00pm
Wednesday 9:00am - 2:00pm
Thursday 9:00am - 2:00pm
Friday 9:00am - 2:00pm
Saturday Closed
Sunday Closed

  • 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 - 1:00pm
Tuesday 9:00am - 1:00pm
Wednesday 9:00am - 1:00pm
Thursday 9:00am - 1:00pm
Friday 9:00am - 1:00pm
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)
  • Packaged Stamps
  • Passport Acceptance
  • Passport Photo
  • Philatelic Services
  • 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:

Alvarado
3861 Smith St
1.5 miles away

Fremont
37010 Dusterberry Way
1.9 miles away

Newark
6655 Clark Ave
2.6 miles away

Niles
160 J St
2.7 miles away

Reviews

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I want know what time the people for postal service live the mail come in to rhe p.o boxes
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The lady that delivers my mail on Carmen Way, 94587 talks LOUDLY and in another language on her cell phone while delivering mail. Shouldn't that be done on her break. I can't talk on a cell phone while I am at work. Besides she was so LOUD that I ran to my door to see what all the ruckus was about. So unprofessional and distracting from what I am doing as well as what she is doing. Maybe that's why my neighbor had to deliver a mis-delivered check to my house. Postal inspectors, supervisor: Tell you carriers to chat on the cell phones while on BREAK or LUNCH, not while performing their federally regulated JOB. Someone wants that job and would do it right! I am not a ROBOT but I am deeply annoyed.
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Tried to call about my passport renewal. I went there twice and was asked to fill an online form. Then I was told to call to make an appointment. When I called, they said it had to be online, when I tried to explain, they hung up on me and refused to answer the phone when I called back. Absolutely the worst customer service I have seen. Can't even speak to a manager, they won't answer the phone.
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Tried calling in to get information regarding my passport renewal. No answer at all Over the course of 3 days. Walked into office to get information regarding passport renewal. Terrible customer service . She basically told me to go take my picture elsewhere and to read my forms to figure out how to get an expedited return. TERRIBLE customer service .... and I know nothing more now than before asking them for help.
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Spent over an hour trying to call this post office as instructed by the customer service number. No one picked up the phone.
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At approx. 7:00 pm I tried to deposit-insert my parcel into the lobby parcel box. It was jammed, however there was someone inside the work area. I asked her to remove the item and she refused. I understand that "no one" is working at this time. However, there was someone there. How did the employee get in the back work area? She was not alone, there was also someone else she was talking to. Would it have created so much trouble if the jammed parcel be removed? So, customers could continue to use the self service kiosk? If this happened to me, I know this must be a continuous issue. Very poor service.
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