Islip Post Office

Post office

309 Main Street, Unit 3, Islip, NY 11751

(631) 581-7931

Appointments are required. Call 631-581-7931 to schedule Mon-Fri 9A-2P and Sat 9A-12P.

Appointment required

Hours and addresses come from the State Department listing, updated November 2, 2026.

Book at USPS Directions Facilities in Islip Facilities in New York

Islip Post Office accepts new U.S. passport applications in person in Islip, NY. First-time and child visits are booked on the USPS scheduler. Search ZIP 11751. How to apply · How to renew

Other facilities in Islip

Islip Town Clerks Office