Shelter Island US Post Office

45 N Ferry Road
Shelter Island, NY 11964
Phone: (631) 749-1857
Fax: (516) 766-5845
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Southold US Post Office

710 Traveler St
Southold - 11971
(631) 765-4027

Sayville US Post Office

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

Elmont US Post Office

778 Elmont Road
Elmont - 11003
(516) 285-4078

Plandome US Post Office

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

Mt. Sinai US Post Office

457 Route 25a
Mt Sinai - 11766
(631) 928-0394

Nesconset US Post Office

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

St. James US Post Office

325 Lake Avenue
St James - 11780
(631) 584-4138

Roosevelt US Post Office

1 Babylon Turnpike
Roosevelt - 11575
(516) 378-6973

Quogue US Post Office

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

West Babylon US Post Office

617 W Montauk Highway
West Babylon - 11704
(631) 422-2276