Post office locations in 13804
| Post Office | Address | Phone | Hours |
| MASONVILLE | 15505 STATE HIGHWAY 8 MASONVILLE, NY 13804 - 9998 | 607-265-3505 | Mon-Fri 08:00 AM - 12:00 PM Sat 08:15 AM - 11:30 AM Sun Closed |
| Post Office | Address | Phone | Hours |
| MASONVILLE | 15505 STATE HIGHWAY 8 MASONVILLE, NY 13804 - 9998 | 607-265-3505 | Mon-Fri 08:00 AM - 12:00 PM Sat 08:15 AM - 11:30 AM Sun Closed |