Elmont US Post Office

798 Meacham Avenue
Elmont, NY 11003
Phone: (516) 887-6247
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East Northport US Post Office

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

Old Westbury US Post Office

223 Store Hill Road # A
Old Westbury - 11568
(516) 333-0964

East Setauket US Post Office

450 Route 25a
East Setauket - 11733
(631) 941-4005

Islandia US Post Office

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

Southold US Post Office

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

Mastic Beach US Post Office

110 Mastic Road
Mastic Beach - 11951
(631) 281-0359

Mattituck US Post Office

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

North Baldwin US Post Office

1620 Grand Avenue
North Baldwin - 11510
(516) 223-5710

Merrick US Post Office

2040 Merrick Road
Merrick - 11566
(516) 378-7087

Ridge US Post Office

1700 Middle Country Road
Ridge - 11961
(631) 345-6842