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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Holbrook US Post Office

445 Furrows Road
Holbrook - 11741
(631) 588-0226

Wainscott US Post Office

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

Remsenburg US Post Office

137 S Country Road
Remsenburg - 11960
(631) 325-5937

Farmingdale US Post Office

380 Main St
Farmingdale - 11735
(516) 249-1552

Wantagh US Post Office

3300 Park Avenue
Wantagh - 11793
(516) 785-3425

US Post Office Processing Center

160 Duryea Road
Melville - 11747
(631) 755-2575

Roslyn Heights US Post Office

66 Mineola Avenue
Roslyn Heights - 11577
(516) 621-8050

Williston Park US Post Office

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

Oyster Bay US Post Office

1 Shore Avenue
Oyster Bay - 11771
(516) 922-8249

Mattituck US Post Office

140 Love Ln
Mattituck - 11952
(631) 298-1364