Wainscott US Post Office

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

542 Sagg Main St
Sagaponack - 11962
(631) 537-9346

Huntington US Post Office

16 New York Avenue
Huntington - 11743
(631) 423-5880

Smithtown US Post Office

25 Route 111
Smithtown - 11787
(631) 360-6709

Massapequa US Post Office

80 Atlantic Avenue
Oceanside - 11572
(516) 766-5829

Sound Beach US Post Office

25 New York Avenue
Sound Beach - 11789
(631) 744-0837

Mastic US Post Office

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

Bridgehampton US Post Office

2322 Montauk Highway
Bridgehampton - 11932
(631) 537-9322

Islip US Post Office

309 Main St # 3
Islip - 11751
(631) 581-7931

Great Neck US Post Office

1 Welwyn Road
Great Neck - 11021
(516) 482-5013

Fishers Island US Post Office

1 Oriental Avenue
Fishers Island - 06390
(631) 788-7835