Post Offices

Post Offices in & near Islip, New York. Operating hours, locations, phone/fax number, services information.

Isl Post Office

Post Office in Islip, New York on Main St Unit 3. Operating hours, phone number, services information, and other locations.

Address: 309 Main St Unit 3, Islip, NY 11751
Phone: 631-581-7931
Fax: 631-224-1376
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Retail Hours

Monday 9:00am - 5:00pm
Tuesday 9:00am - 5:00pm
Wednesday 9:00am - 5:00pm
Thursday 9:00am - 5:00pm
Friday 9:00am - 5:00pm
Saturday 9:00am - 1:00pm
Sunday Closed

Lobby Hours

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 3:00pm
Sunday Closed

Last Collection Times

Monday 9:00am - 2:00pm
Tuesday 9:00am - 2:00pm
Wednesday 9:00am - 2:00pm
Thursday 9:00am - 2:00pm
Friday 9:00am - 2:00pm
Saturday 9:00am - 12:00pm
Sunday Closed

East Isl Post Office

Address: 11 Greenwood Ave, East Islip, NY 11730
Phone: 631-581-7807
Fax: 631-224-9064
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Islip Terra Post Office

Address: 136 Carleton Ave, Islip Terrace, NY 11752
Phone: 631-581-7894
Fax: 631-224-9083
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Bay Shor Post Office

Address: 1314 5th Ave, Bay Shore, NY 11706
Phone: 631-969-3504
Fax: 631-968-0770
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Bay Shor Post Office

Address: 1314 5th Ave, Bay Shore, NY 11706
Phone: 631-969-3504
Fax: 631-968-0770
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Federal Court Hou Post Office

Address: 101 Federal Plz, Central Islip, NY 11722
Phone: 631-787-6000
Fax: 631-787-6002
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457