Islip US Post Office

309 Main St # 3
Islip, NY 11751
Phone: (631) 581-7931
Fax: (516) 487-2508
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Center Moriches US Post Office

35 Railroad Avenue
Center Moriches - 11934
(631) 878-0953

Elmont US Post Office

798 Meacham Avenue
Elmont - 11003
(516) 887-6247

Cherry Grove US Post Office

1000 Bay Walk
Cherry Grove - 11782
(631) 589-1177

Old Bethpage US Post Office

696 Old Bethpage Road
Old Bethpage - 11804
(516) 249-2915

Plainview US Post Office

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

Sag Harbor US Post Office

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

East Northport US Post Office

297 Larkfield Road
East Northport - 11731
(631) 368-5632

East Quogue US Post Office

6 Bay Avenue
East Quogue - 11942
(631) 653-5247

Bay Shore US Post Office

10 Bay Shore Avenue
Bay Shore - 11706
(631) 969-3506

Southold US Post Office

710 Traveler St
Southold - 11971
(631) 765-4027