Mt. Sinai US Post Office

457 Route 25a
Mt Sinai, NY 11766
Phone: (631) 928-0394
Fax: (516) 747-5876
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East Hampton US Post Office

291 Springs Fireplace Road
East Hampton - 11937
(631) 324-0790

Sayville US Post Office

130 Greene Avenue
Sayville - 11782
(631) 589-6963

Cedarhurst US Post Office

124 Grove Avenue
Cedarhurst - 11516
(516) 295-1452

Holbrook US Post Office

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

Lindenhurst US Post Office

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

Bellmore US Post Office

2611 Merrick Road
Bellmore - 11710
(516) 781-0579

Upton US Post Office

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

Malverne US Post Office

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

Port Jefferson Station US Post Office

544 Jefferson Placeaza
Port Jefferson Station - 11776
(631) 473-2751

Center Moriches US Post Office

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