Post office locations in 11798
| Post Office | Address | Phone | Hours |
| WHEATLEY HEIGHTS | 6 COLONIAL SPRINGS RD WYANDANCH, NY 11798 - 1075 | 631-643-2912 | Mon-Fri 09:00 AM - 05:00 PM Sat 09:00 AM - 01:00 PM Sun Closed |
| WYANDANCH | 1569 STRAIGHT PATH WYANDANCH, NY 11798 - 3230 | 631-643-3913 | Mon-Fri 09:00 AM - 05:00 PM Sat 09:00 AM - 01:00 PM Sun Closed |