Speonk US Post Office

323 Montauk Highway
Speonk, NY 11972
Phone: (631) 325-1741
Fax: (631) 360-0532
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Port Jefferson Station US Post Office

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

Centerport US Post Office

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

North Babylon US Post Office

1196 Deer Park Avenue
North Babylon - 11703
(631) 667-4693

Shirely US Post Office

800 Montauk Highway # 1
Shirley - 11967
(631) 281-0479

Roslyn US Post Office

1391 Old Northern Blvd
Roslyn - 11576
(516) 621-7397

Ronkonkoma US Post Office

200 Hawkins Avenue
Ronkonkoma - 11779
(631) 588-0301

Hampton US Post Office

16 Ponquogue Avenue
Hampton Bays - 11946
(631) 728-6994

Quogue US Post Office

6 Midland St
Quogue - 11959
(631) 653-6427

Fair Harbor US Post Office

100 Bay Walk
Fair Harbor - 11706
(631) 583-7080

Shelter Island US Post Office

45 N Ferry Road
Shelter Island - 11964
(631) 749-1857