Islip Post Office

309 Main St Unit 3, Islip, NY 11751

Contact Numbers:

Phone: 631-581-7931
Fax: 631-224-1376
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

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

Bulk Mail Acceptance Hours

Monday-Saturday 9:00am - 4:00pm
Sunday Closed

Pickup Services Hours

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

Lobby Hours

Monday-Friday 5:30am - 5:45pm
Saturday 5:30am - 4:00pm
Sunday Closed

PO Box Access Hours

Monday-Friday 5:30am - 5:45pm
Saturday 5:30am - 4:00pm
Sunday Closed

PO Box Delivery Time

Monday-Saturday 11:00am
Sunday Closed

Last Collection Times

Monday-Friday 5:00pm
Saturday 3:00pm
Sunday Closed

Carrier Facility Hours

Monday-Friday 7:30am - 5:00pm
Saturday 7:30am - 2:00pm
Sunday Closed

Passport Acceptance Hours

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

  • Visit our Passport FAQ page for a complete overview of what to bring, what you need to know, and how long it will take.
  • You will need two forms of Identification with copies.
  • A passport quality photo if no available photo hours listed.
  • The appropriate application form printed and filled out, and the required fee for applying or renewing.
  • You can find up to date costs, information, and forms at the State Departments Travel Site

*An appointment is required to apply for or renew US Passports. Please Call.

Passport Photo Hours

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

Global Express Guaranteed® Hours

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

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • Burial Flags
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Global Express Guaranteed®
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Passport Acceptance
  • Passport Photo
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Priority Mail International®

Visit our Links Page for Change of Address, Hold Mail/Stop Delivery, PO Boxes™ rentals and fees, Rates on Postage Stamps and Freight/Shipping, Holidays, Bulk Mail, Money Orders, and Available Jobs.

*Please call to verify information. Is anything incorrect? Let us know here

Nearby Post Offices:

Penataquit
10 Bay Shore Ave
1.1 miles away

Islip Terrace
136 Carleton Ave
1.2 miles away

East Islip
11 Greenwood Ave
1.3 miles away

Federal Court House
101 Federal Plz
1.7 miles away

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