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Union City Post Office in Union, CA

Find Union City Post Office in Union, CA 94587 to get information on mail-related services, postal services, postal items and payment, parcel shipment, and mail and parcel delivery.

  • Union City Post Office
  • 33170 Alvarado-Niles Road, Union, CA 94587
  • 510-471-1180
  • Mon-Fri 7:30 AM-5:00 PM
    Sat 7:30 AM-12:00 PM

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