Central Islip US Post Office

110 E Suffolk Avenue
Central Islip, NY 11722
Phone: (631) 234-0547
Fax: (631) 234-7429
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Hampton US Post Office

16 Ponquogue Avenue
Hampton Bays - 11946
(631) 728-6994

Jamesport US Post Office

1451 Route 25
Jamesport - 11947
(631) 722-5946

Nesconset US Post Office

226 Smithtown Blvd
Nesconset - 11767
(631) 265-3278

Massapequa Park US Post Office

4910 Merrick Road
Massapequa Park - 11762
(516) 798-1268

Water Mill US Post Office

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

Centereach US Post Office

245 Centereach Mall
Centereach - 11720
(631) 588-7069

Plandome US Post Office

155 Stonytown Road
Plandome - 11030
(516) 627-3747

Sag Harbor US Post Office

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

Glen Cove US Post Office

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

Bayport US Post Office

850 Montauk Highway
Bayport - 11705
(631) 472-7396