Post office locations in 12456
| Post Office | Address | Phone | Hours |
| MOUNT MARION | 542 GLASCO TPKE MOUNT MARION, NY 12456 - 9998 | 845-246-9661 | Mon-Fri 10:00 AM - 01:00 PM 02:00 PM - 05:00 PM Sat 09:00 AM - 11:30 AM Sun Closed |
| Post Office | Address | Phone | Hours |
| MOUNT MARION | 542 GLASCO TPKE MOUNT MARION, NY 12456 - 9998 | 845-246-9661 | Mon-Fri 10:00 AM - 01:00 PM 02:00 PM - 05:00 PM Sat 09:00 AM - 11:30 AM Sun Closed |