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



Bulk Mail Acceptance Hours

Monday-Friday 9:00am - 1:00pm
Saturday-Sunday Closed

Pickup Services Hours

Monday-Friday 9:00am - 4:00pm
Saturday-Sunday Closed

Lobby Hours

Monday-Sunday 12:01am - 11:59pm

PO Box Access Hours

Monday-Sunday 12:01am - 11:59pm

PO Box Delivery Time

Monday Sunday Closed
Tuesday-Saturday 10:00am

Last Collection Times

Monday-Saturday 5:00pm
Sunday Closed

Self-Service Kiosk Availability

Monday-Sunday 12:01am - 11:59pm

Carrier Facility Hours

Monday-Friday 9:00am - 4:30pm
Saturday-Sunday Closed

Passport Acceptance Hours

Monday-Friday 9:00am - 2:00pm
Saturday-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 if no available photo hours listed.
  • 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.

Passport Photo Hours

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

Global Express Guaranteed® Hours

Monday-Friday 9:00am - 5:00pm
Saturday 9:00am - 12:30pm
Sunday Closed

Philatelic Services Hours

Monday-Friday 9:00am - 4:00pm
Saturday-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
  • Global Express Guaranteed®
  • 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
  • Priority Mail International®
  • Lot Parking

Visit our Links Page for Change of Address, Hold Mail/Stop Delivery, PO Boxes™ rentals and fees, Rates on Postage Stamps and Freight/Shipping, Holidays, Bulk Mail, Money Orders, 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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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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