store:
 location:

US Post Office, 1126 N Mountain Ave, Ontario, California, 91762-9991

Store Hours of Operation, Location & Phone Number for US Post Office


  1. Plaza Center
    1126 N Mountain Ave Ontario CA 91762-9991

    Hours(Opening & Closing Times):
    Mon - Fri 8:30am - 5:00pm Sat - Sun Closed

    Phone Number: (909) 933-3837

    Customer Service Email or Contact:
    http://faq.usps.com/adaptivedesktop/faq.jsp?ef=USPSFAQ&dest=EmailUs

The map and information below will help you find the closest US Post Office near you. Need to know what time US Post Office in Ontario opens or closes, or whether it's open 24 hours a day? Read below for business times, daylight and evening hours, street address, and more.