Post office locations in 11779
| Post Office | Address | Phone | Hours |
| LAKE RONKONKOMA | 300 PORTION RD RONKONKOMA, NY 11779 - 2348 | 631-588-1292 | Mon-Fri 9:00am - 1:30pm 3:30pm - 5:00pm Sat 9:00am - 12:00pm Sun Closed |
| RONKONKOMA | 200 HAWKINS AVE RONKONKOMA, NY 11779 - 4286 | 631-588-0301 | Mon-Fri 9:00am - 5:00pm Sat 9:00am - 1:00pm Sun Closed |