Sound Beach US Post Office

25 New York Avenue
Sound Beach, NY 11789
Phone: (631) 744-0837
Fax: (631) 360-0532
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Island Park US Post Office

367 Long Beach Road
Island Park - 11558
(516) 432-9537

Quogue US Post Office

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

Port Jefferson US Post Office

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

East Quogue US Post Office

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

Mattituck US Post Office

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

Wyandanch US Post Office

1569 Straight Path
Wyandanch - 11798
(631) 643-3914

Glenwood Landing US Post Office

123 Glenwood Road
Glenwood Landing - 11547
(516) 676-8452

Water Mill US Post Office

670 Montauk Highway
Water Mill - 11976
(631) 726-6310

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