Central Islip US Post Office

101 Federal Plaza
Central Islip, NY 11722
Phone: (631) 715-0001
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1

Old Westbury US Post Office

223 Store Hill Road # A
Old Westbury - 11568
(516) 333-0964
2

East Marion US Post Office

9165 Main Road
East Marion - 11939
(631) 477-1668
3

Sag Harbor US Post Office

21 Long Island Avenue
Sag Harbor - 11963
(631) 725-8968
4

Westhampton Beach US Post Office

170 Main St
Westhampton Beach - 11978
(631) 288-4093
5

East Setauket US Post Office

101 Main St
Setauket - 11733
(631) 941-4042
6

Roslyn US Post Office

1391 Old Northern Blvd
Roslyn - 11576
(516) 621-7397
7

Quogue US Post Office

6 Midland St
Quogue - 11959
(631) 653-6427
8

Jericho US Post Office

425 N Broadway
Jericho - 11753
(516) 681-6248
9

Atlantic Beach US Post Office

2009 Park St
Atlantic Beach - 11509
(516) 239-1178
10

Bethpage US Post Office

288 Grumman Road W
Bethpage - 11714
(516) 349-5000