Mt. Sinai US Post Office

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

290 Montauk Highway
Moriches - 11955
(631) 878-1381

Bayville US Post Office

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

Brentwood US Post Office

25 2nd Avenue
Brentwood - 11717
(631) 273-0947

Island Park US Post Office

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

Deer Park US Post Office

375 Carlls Path
Deer Park - 11729
(631) 667-6490

Rocky Point US Post Office

346 Route 25a # 84
Rocky Point - 11778
(631) 744-0635

Old Westbury US Post Office

1 Store Hill Road # A
Old Westbury - 11568
(516) 626-5247

Greenvale US Post Office

37 Northern Blvd
Greenvale - 11548
(516) 621-7163

Garden City US Post Office

830 Stewart Avenue
Garden City - 11599
(516) 228-7502

Copiague US Post Office

695 Marconi Blvd
Copiague - 11726
(631) 842-9084