East Setauket US Post Office

450 Route 25a
East Setauket, NY 11733
Phone: (631) 941-4005
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Fair Harbor US Post Office

100 Bay Walk
Fair Harbor - 11706
(631) 583-7080

St. James US Post Office

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

Mastic Beach US Post Office

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

New Suffolk US Post Office

375 1st St
New Suffolk - 11956
(631) 734-6271

Huntington US Post Office

55 Gerard St
Huntington - 11743
(631) 427-8777

Shelter Island US Post Office

45 N Ferry Road
Shelter Island - 11964
(631) 749-1857

Holtsville US Post Office

162 Long Island Avenue
Holtsville - 11742
(631) 475-1761

Moriches US Post Office

290 Montauk Highway
Moriches - 11955
(631) 878-1381

Hauppauge US Post Office

150 Oser Avenue
Hauppauge - 11788
(631) 231-3155

Great Neck US Post Office

661 Middle Neck Road
Great Neck - 11023
(516) 829-6315