Riverhead US Post Office

1210 W Main St
Riverhead, NY 11901
Phone: (631) 727-1019
Fax: (516) 845-7406
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Remsenburg US Post Office

137 S Country Road
Remsenburg - 11960
(631) 325-5937

Ridge US Post Office

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

Rockville US Post Office

250 Merrick Road
Rockville Centre - 11570
(516) 766-5749

Southold US Post Office

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

Great River US Post Office

62 River Road
Great River - 11739
(631) 581-7680

East Northport US Post Office

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

Hicksville US Post Office

109 Ludy St
Hicksville - 11801
(516) 433-9188

Shelter Island US Post Office

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

Lynbrook US Post Office

100 Broadway
Lynbrook - 11563
(516) 599-7587

Port Jefferson US Post Office

407 E Main St # 17
Port Jefferson - 11777
(631) 473-1065