Oyster Bay US Post Office

1 Shore Avenue
Oyster Bay, NY 11771
Phone: (516) 922-8249
Fax: (516) 766-7585
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Montauk US Post Office

73 S Euclid Avenue
Montauk - 11954
(631) 668-7043

Manhasset US Post Office

28 Maple Place
Manhasset - 11030
(516) 627-0536

Nesconset US Post Office

226 Smithtown Blvd
Nesconset - 11767
(631) 265-3278

Seaford US Post Office

3575 Merrick Road
Seaford - 11783
(516) 785-3851

Syosset US Post Office

40 Queens St
Syosset - 11791
(516) 921-0746

Islandia US Post Office

PO Box 7800
Islandia - 11760
(631) 582-7420

Brightwaters US Post Office

145 Orinoco Dr
Brightwaters - 11718
(631) 206-4855

Valley Stream US Post Office

111 S Franklin Avenue
Valley Stream - 11580
(516) 825-8739

Hampton US Post Office

16 Ponquogue Avenue
Hampton Bays - 11946
(631) 728-6994

East Islip US Post Office

11 Greenwood Avenue
East Islip - 11730
(631) 581-7807