Mt. Sinai US Post Office

457 Route 25a
Mt Sinai, NY 11766
Phone: (631) 928-0394
Fax: (516) 747-5876
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Plainview US Post Office

1662 Old Country Road
Plainview - 11803
(516) 845-7162

Bay Shore US Post Office

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

Sound Beach US Post Office

25 New York Avenue
Sound Beach - 11789
(631) 744-0837

Cold Spring Harbor US Post Office

126 Main St
Cold Spring Hbr - 11724
(631) 692-5307

Glen Cove US Post Office

2 Glen Cove Avenue
Glen Cove - 11542
(516) 671-7847

East Northport US Post Office

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

Glen Head US Post Office

240 Glen Head Road # 1
Glen Head - 11545
(516) 676-8465

Elmont US Post Office

260 Elmont Road
Elmont - 11003
(516) 354-5947

Quogue US Post Office

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

Holtsville US Post Office

162 Long Island Avenue
Holtsville - 11742
(631) 475-1761