Upton US Post Office

2 Center St
Upton, NY 11973
Phone: (631) 344-2539
Fax: (516) 496-4736
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Roslyn Heights US Post Office

66 Mineola Avenue
Roslyn Heights - 11577
(516) 621-8050

Lake Grove US Post Office

1001 Hawkins Avenue
Lake Grove - 11755
(631) 588-7019

Williston Park US Post Office

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

Nesconset US Post Office

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

Mill Neck US Post Office

32 Frost Mill Road
Mill Neck - 11765
(516) 922-8247

Southold US Post Office

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

Huntington US Post Office

16 New York Avenue
Huntington - 11743
(631) 423-5880

Merrick US Post Office

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

Yaphank US Post Office

5 E Main St
Yaphank - 11980
(631) 345-6829

Uniondale US Post Office

1000 Front St
Uniondale - 11553
(516) 481-8245