Northport US Post Office

240 Main St
Northport, NY 11768
Phone: (631) 261-6941
Fax: (516) 437-2896
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Melville US Post Office

718 Walt Whitman Road
Melville - 11747
(631) 421-0726

Island Park US Post Office

367 Long Beach Road
Island Park - 11558
(516) 432-9537

West Islip US Post Office

480 Union Blvd
West Islip - 11795
(631) 669-5157

East Setauket US Post Office

450 Route 25a
East Setauket - 11733
(631) 941-4005

Montauk US Post Office

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

Plainview US Post Office

1662 Old Country Road
Plainview - 11803
(516) 845-7162

Fair Harbor US Post Office

100 Bay Walk
Fair Harbor - 11706
(631) 583-7080

Locust US Post Office

115 Forest Avenue
Locust Valley - 11560
(516) 671-1559

Sag Harbor US Post Office

21 Long Island Avenue
Sag Harbor - 11963
(631) 725-8968

Williston Park US Post Office

446 Willis Avenue
Williston Park - 11596
(516) 746-3247