Bayville US Post Office

251 Bayville Avenue
Bayville, NY 11709
Phone: (516) 628-9235
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Cold Spring Harbor US Post Office

126 Main St
Cold Spring Hbr - 11724
(631) 692-5307

Upton US Post Office

2 Center St
Upton - 11973
(631) 344-2539

Smithtown US Post Office

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

Deer Park US Post Office

375 Carlls Path
Deer Park - 11729
(631) 667-6490

Hauppauge US Post Office

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

East Setauket US Post Office

450 Route 25a
East Setauket - 11733
(631) 941-4005

Kings Point US Post Office

300 Steamboat Road
Kings Point - 11024
(516) 773-5298

Amityville US Post Office

77 Ireland Place
Amityville - 11701
631-264-3532

Mt. Sinai US Post Office

457 Route 25a
Mt Sinai - 11766
(631) 928-0394

Northport US Post Office

240 Main St
Northport - 11768
(631) 261-6941