Post office locations in 11779
| Post Office | Address | Phone | Hours |
| LAKE RONKONKOMA | 300 PORTION RD RONKONKOMA, NY 11779 - 2348 | 631-588-1292 | Mon-Fri 09:00 AM - 01:30 PM 03:30 PM - 05:00 PM Sat 09:00 AM - 12:00 PM Sun Closed |
| RONKONKOMA | 200 HAWKINS AVE RONKONKOMA, NY 11779 - 4286 | 631-588-0301 | Mon-Fri 09:00 AM - 05:00 PM Sat 09:00 AM - 01:00 PM Sun Closed |