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United States Postal Service
544 Jefferson Plz, Port Jefferson Station, NY 11776
This U.S. Postal Service office is located in Jefferson Plaza on Route 112 between downtown and Route 347.  AllMore 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.
United States Postal Service
407 E Main St, Port Jefferson, NY 11777
This branch of the United States Postal Service is located in a historic building in downtown Port Jefferson. More There are drop-off mail boxes outside the building. The last daily pickup at this location is 4:30pm, and 1pm on Saturdays. PO boxes can be applied for and managed online.  Visit the USPS website for full information and services including stamp purchase, postage calculation, mail tracking, printing shipping labels and forwarding or temporarily stopping your mail. For TTY Service for the hearing impaired, call 877-889-2457.
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