Islip Terrace US Post Office

136 Carleton Avenue
Islip Terrace, NY 11752
Phone: (631) 581-7894
Fax: (516) 487-2508
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Central Islip US Post Office

101 Federal Plaza
Central Islip - 11722
(631) 715-0001

New Suffolk US Post Office

375 1st St
New Suffolk - 11956
(631) 734-6271

East Norwich US Post Office

1001 Oyster Bay Road
East Norwich - 11732
(516) 922-8283

Farmingville US Post Office

500 Horseblock Road
Farmingville - 11738
(631) 732-8625

Locust US Post Office

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

Fishers Island US Post Office

1 Oriental Avenue
Fishers Island - 06390
(631) 788-7835

Plandome US Post Office

155 Stonytown Road
Plandome - 11030
(516) 627-3747

Montauk US Post Office

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

Peconic US Post Office

2575 Peconic Ln
Peconic - 11958
(631) 765-9348

Valley Stream US Post Office

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