Montauk US Post Office

73 S Euclid Avenue
Montauk, NY 11954
Phone: (631) 668-7043
Fax: (516) 747-5876
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Sag Harbor US Post Office

21 Long Island Avenue
Sag Harbor - 11963
(631) 725-8968

Bayport US Post Office

850 Montauk Highway
Bayport - 11705
(631) 472-7396

Centerport US Post Office

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

North Baldwin US Post Office

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

Garden City US Post Office

830 Stewart Avenue
Garden City - 11599
(516) 228-7502

Elmont US Post Office

778 Elmont Road
Elmont - 11003
(516) 285-4078

Islandia US Post Office

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

Massapequa Park US Post Office

4910 Merrick Road
Massapequa Park - 11762
(516) 798-1268

East Setauket US Post Office

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

Mastic Beach US Post Office

110 Mastic Road
Mastic Beach - 11951
(631) 281-0359