Post offices provide daily mail and package delivery, retail postal services, and specialty offerings like passport acceptance and money orders to residents and businesses. There are 4 Post Office locations in Ontario, California.
Residents of Ontario should check the USPS website or call their nearest branch to confirm current window hours before visiting, as lobby hours with self-service kiosk access often differ from staffed window hours. Larger locations may also offer package pickup lockers accessible 24 hours a day.
List of Ontario City, California Post Office
Downtown Ontario Post Office
Guasti Post Office
Ontario Post Office
Plaza Center Post Office
Post Office near Malverne
Residents of Ontario can manage many postal needs without visiting in person by using USPS.com to track packages, submit change of address requests, schedule free package pickups, and purchase postage. When visiting a post office for passport acceptance or certified mail, bring appropriate ID and arrive before the window closes as lines can be longer near midday and end of month.
You may also find Post Office locations in nearby cities including Chino, Rancho Cucamonga, Ontario.