Water Mill US Post Office

670 Montauk Highway
Water Mill, NY 11976
Phone: (631) 726-6310
Fax: (516) 496-4736
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Speonk US Post Office

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

Hempstead US Post Office

200 Fulton Avenue
Hempstead - 11550
(516) 560-1120

East Marion US Post Office

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

Cutchogue US Post Office

240 Griffing St
Cutchogue - 11935
(631) 734-6032

Port Jefferson Station US Post Office

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

East Setauket US Post Office

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

Merrick US Post Office

2040 Merrick Road
Merrick - 11566
(516) 378-7087

East Islip US Post Office

11 Greenwood Avenue
East Islip - 11730
(631) 581-7807

Hampton US Post Office

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

Cherry Grove US Post Office

1000 Bay Walk
Cherry Grove - 11782
(631) 589-1177