Wainscott US Post Office

357 Montauk Highway
Wainscott, NY 11975
Phone: (631) 537-8943
Fax: (516) 496-4736
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Peconic US Post Office

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

Glen Head US Post Office

240 Glen Head Road # 1
Glen Head - 11545
(516) 676-8465

Valley Stream US Post Office

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

Cherry Grove US Post Office

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

Mastic US Post Office

1450 Montauk Highway
Mastic - 11950
(631) 281-0275

Hauppauge US Post Office

150 Oser Avenue
Hauppauge - 11788
(631) 231-3155

Remsenburg US Post Office

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

Centereach US Post Office

245 Centereach Mall
Centereach - 11720
(631) 588-7069

Riverhead US Post Office

1210 W Main St
Riverhead - 11901
(631) 727-1019

Water Mill US Post Office

670 Montauk Highway
Water Mill - 11976
(631) 726-6310