Upton US Post Office

2 Center St
Upton, NY 11973
Phone: (631) 344-2539
Fax: (516) 496-4736
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Saltaire US Post Office

Broadway St
Saltaire - 11706
(631) 583-7716

Mt. Sinai US Post Office

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

East Marion US Post Office

9165 Main Road
East Marion - 11939
(631) 477-1668

East Quogue US Post Office

6 Bay Avenue
East Quogue - 11942
(631) 653-5247

Bay Shore US Post Office

10 Bay Shore Avenue
Bay Shore - 11706
(631) 969-3506

Manhasset US Post Office

28 Maple Place
Manhasset - 11030
(516) 627-0536

Malverne US Post Office

339 Hempstead Avenue
Malverne - 11565
(516) 599-7583

Northport US Post Office

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

Speonk US Post Office

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

Mattituck US Post Office

140 Love Ln
Mattituck - 11952
(631) 298-1364