Great River US Post Office

62 River Road
Great River, NY 11739
Phone: (631) 581-7680
Fax: (516) 487-2508
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East Quogue US Post Office

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

Long Beach US Post Office

101 E Park Avenue
Long Beach - 11561
(516) 432-5484

Center Moriches US Post Office

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

Garden City US Post Office

630 Old Country Road # 530
Garden City - 11530
(516) 746-1394

Port Jefferson US Post Office

407 E Main St # 17
Port Jefferson - 11777
(631) 473-1065

North Babylon US Post Office

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

Sag Harbor US Post Office

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

Upton US Post Office

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

East Hampton US Post Office

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

Bayville US Post Office

251 Bayville Avenue
Bayville - 11709
(516) 628-9235