Central Islip US Post Office

110 E Suffolk Avenue
Central Islip, NY 11722
Phone: (631) 234-0547
Fax: (631) 234-7429
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Baldwin US Post Office

2260 Grand Avenue
Baldwin - 11510
(516) 223-5024

Bayport US Post Office

850 Montauk Highway
Bayport - 11705
(631) 472-7396

Deer Park US Post Office

375 Carlls Path
Deer Park - 11729
(631) 667-6490

East Hampton US Post Office

12 Gay Road
East Hampton - 11937
(631) 324-6320

Moriches US Post Office

290 Montauk Highway
Moriches - 11955
(631) 878-1381

Oakdale US Post Office

927 Montauk Highway
Oakdale - 11769
(631) 589-2683

Seaford US Post Office

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

Shelter Island US Post Office

45 N Ferry Road
Shelter Island - 11964
(631) 749-1857

Shelter Island Heights US Post Office

6 Grand Avenue
Shelter Island Heights - 11965
(631) 749-0486

Shoreham US Post Office

69 Route 25a
Shoreham - 11786
(631) 744-3185