Holtsville US Post Office

162 Long Island Avenue
Holtsville, NY 11742
Phone: (631) 475-1761
Fax: (516) 487-2508
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Speonk US Post Office

323 Montauk Highway
Speonk - 11972
(631) 325-1741

Shelter Island US Post Office

45 N Ferry Road
Shelter Island - 11964
(631) 749-1857

Islandia US Post Office

PO Box 7800
Islandia - 11760
(631) 582-7420

Central Islip US Post Office

101 Federal Plaza
Central Islip - 11722
(631) 715-0001

Bayville US Post Office

251 Bayville Avenue
Bayville - 11709
(516) 628-9235

Water Mill US Post Office

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

Uniondale US Post Office

1000 Front St
Uniondale - 11553
(516) 481-8245

Holbrook US Post Office

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

Albertson US Post Office

860 Willis Avenue
Albertson - 11507
(516) 746-3512

Centerport US Post Office

434 E Main St
Centerport - 11721
(631) 261-6918