Smithtown US Post Office

25 Route 111
Smithtown, NY 11787
Phone: (631) 360-6709
Fax: (631) 360-0532
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Calverton US Post Office

3690 Middle Country Road
Calverton - 11933
(631) 727-0067

Hauppauge US Post Office

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

Copiague US Post Office

695 Marconi Blvd
Copiague - 11726
(631) 842-9084

North Baldwin US Post Office

1620 Grand Avenue
North Baldwin - 11510
(516) 223-5710

Lindenhurst US Post Office

65 E Hoffman Avenue
Lindenhurst - 11757
(631) 226-6914

Holbrook US Post Office

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

Center Moriches US Post Office

35 Railroad Avenue
Center Moriches - 11934
(631) 878-0953

Syosset US Post Office

40 Queens St
Syosset - 11791
(516) 921-0746

Centereach US Post Office

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

Oyster Bay US Post Office

1 Shore Avenue
Oyster Bay - 11771
(516) 922-8249