| Post Office | DOWNTOWN ONTARIO |
|---|---|
| Address | 123 W HOLT BLVD ONTARIO, CA 91762 - 9998 |
| Phone | 909-933-3837 |
| Hours | Mon-Fri 09:00 AM - 05:00 PM Sat Closed Sun Closed |
| Post Office | ONTARIO |
|---|---|
| Address | 1555 E HOLT BLVD ONTARIO, CA 91761 - 9998 |
| Phone | 909-933-3837 |
| Hours | Mon-Fri 08:30 AM - 05:00 PM Sat 09:00 AM - 03:00 PM Sun Closed |
| Post Office | PLAZA CENTER |
|---|---|
| Address | 1126 N MOUNTAIN AVE ONTARIO, CA 91762 - 9991 |
| Phone | 909-933-3837 |
| Hours | Mon-Fri 08:30 AM - 05:00 PM Sat Closed Sun Closed |