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United States Postal Service

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This U.S. Postal Service office is located in Jefferson Plaza on Route 112 between downtown and Route 347.  All services are offered here, including passport processing, P.O. boxes and stamp machines. There is 24-hour lobby access as well as outdoor drop-off mailboxes, plus a FedEx drop box.
544 Jefferson Plz, Port Jefferson Station, NY 11776
(800) 275-8777
  • Hours: Window: Mon - Fri, 9am - 5pm; Sat, 9am - 1pm; Sun, closed.
    Passports: Mon - Fri, 9am - 3pm; Sat, 10am - noon. Lobby/P.O. boxes: Daily, 24hrs.
  • Accessible: yes
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