Sag Harbor US Post Office

21 Long Island Avenue
Sag Harbor, NY 11963
Phone: (631) 725-8968
Fax: (516) 766-5845
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West Hempstead US Post Office

245 Hempstead Avenue
West Hempstead - 11552
(516) 481-5430

Cedarhurst US Post Office

124 Grove Avenue
Cedarhurst - 11516
(516) 295-1452

East Marion US Post Office

9165 Main Road
East Marion - 11939
(631) 477-1668

Roslyn US Post Office

1391 Old Northern Blvd
Roslyn - 11576
(516) 621-7397

Greenport US Post Office

131 Front St
Greenport - 11944
(631) 477-1493

East Hampton US Post Office

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

Lake Grove US Post Office

1001 Hawkins Avenue
Lake Grove - 11755
(631) 588-7019

West Sayville US Post Office

12 Washington Avenue
West Sayville - 11796
(631) 589-6958

Garden City US Post Office

600 Franklin Avenue
Garden City - 11530
(516) 747-2201

Wainscott US Post Office

357 Montauk Highway
Wainscott - 11975
(631) 537-8943