Sea Cliff US Post Office

200 Sea Cliff Avenue
Sea Cliff, NY 11579
Phone: (516) 671-8258
Fax: (516) 766-5845
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Port Jefferson Station US Post Office

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

East Quogue US Post Office

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

Island Park US Post Office

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

Lawrence US Post Office

12 Bayview Avenue
Lawrence - 11559
(516) 239-2834

Mastic Beach US Post Office

110 Mastic Road
Mastic Beach - 11951
(631) 281-0359

East Northport US Post Office

297 Larkfield Road
East Northport - 11731
(631) 368-5632

Riverhead US Post Office

1210 W Main St
Riverhead - 11901
(631) 727-1019

Shirely US Post Office

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

Bay Shore US Post Office

1314 5th Avenue
Bay Shore - 11706
(631) 969-3504

Uniondale US Post Office

1000 Front St
Uniondale - 11553
(516) 481-8245