Water Mill US Post Office

670 Montauk Highway
Water Mill, NY 11976
Phone: (631) 726-6310
Fax: (516) 496-4736
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Long Beach US Post Office

101 E Park Avenue
Long Beach - 11561
(516) 432-5484

Westhampton Beach US Post Office

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

Holbrook US Post Office

445 Furrows Road
Holbrook - 11741
(631) 588-0226

Plandome US Post Office

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

Copiague US Post Office

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

Deer Park US Post Office

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

Mattituck US Post Office

140 Love Ln
Mattituck - 11952
(631) 298-1364

Glenwood Landing US Post Office

123 Glenwood Road
Glenwood Landing - 11547
(516) 676-8452

Lake Grove US Post Office

1001 Hawkins Avenue
Lake Grove - 11755
(631) 588-7019

Quogue US Post Office

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