Southold US Post Office

710 Traveler St
Southold, NY 11971
Phone: (631) 765-4027
Fax: (631) 360-0532
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Sag Harbor US Post Office

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

Levittown US Post Office

180 Gardiners Avenue
Levittown - 11756
(516) 735-7343

East Northport US Post Office

297 Larkfield Road
East Northport - 11731
(631) 368-5632

Westbury US Post Office

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

Commack US Post Office

150 Veterans Memorial Highway
Commack - 11725
(631) 543-3647

West Babylon US Post Office

385 Route 109
West Babylon - 11704
(631) 893-0560

North Babylon US Post Office

1196 Deer Park Avenue
North Babylon - 11703
(631) 667-4693

Williston Park US Post Office

446 Willis Avenue
Williston Park - 11596
(516) 746-3247

Old Bethpage US Post Office

696 Old Bethpage Road
Old Bethpage - 11804
(516) 249-2915

Holbrook US Post Office

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