Islip US Post Office

309 Main St # 3
Islip, NY 11751
Phone: (631) 581-7931
Fax: (516) 487-2508
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Community Offices / Post Offices

Post Offices

Amityville US Post Office

77 Ireland Place
Amityville - 11701
631-264-3532
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Massapequa Park US Post Office

4910 Merrick Road
Massapequa Park - 11762
(516) 798-1268
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Mastic US Post Office

1450 Montauk Highway
Mastic - 11950
(631) 281-0275
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Miller Placeace US Post Office

47 Echo Avenue
Miller Placeace - 11764
(631) 473-8134
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Mt. Sinai US Post Office

457 Route 25a
Mt Sinai - 11766
(631) 928-0394
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Oyster Bay US Post Office

1 Shore Avenue
Oyster Bay - 11771
(516) 922-8249
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Sayville US Post Office

130 Greene Avenue
Sayville - 11782
(631) 589-6963
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Stony Brook US Post Office

129 Main St
Stony Brook - 11790
(631) 751-5691
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Westhampton US Post Office

408 Mill Road
Westhampton - 11977
(631) 288-4081
Post Offices

US Post Office Processing Center

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