Sag Harbor US Post Office

21 Long Island Avenue
Sag Harbor, NY 11963
Phone: (631) 725-8968
Fax: (516) 766-5845
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Sound Beach US Post Office

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

Islip Terrace US Post Office

136 Carleton Avenue
Islip Terrace - 11752
(631) 581-7894

Sayville US Post Office

130 Greene Avenue
Sayville - 11782
(631) 589-6963

West Sayville US Post Office

12 Washington Avenue
West Sayville - 11796
(631) 589-6958

Westbury US Post Office

360 Maple Avenue
Westbury - 11590
(516) 333-3598

Amityville US Post Office

77 Ireland Place
Amityville - 11701
631-264-3532

Islandia US Post Office

PO Box 7800
Islandia - 11760
(631) 582-7420

Farmingville US Post Office

500 Horseblock Road
Farmingville - 11738
(631) 732-8625

New Hyde Park US Post Office

44 Millers Ln
New Hyde Park - 11040
(516) 616-6853

Mastic US Post Office

1450 Montauk Highway
Mastic - 11950
(631) 281-0275