Greenport US Post Office

131 Front St
Greenport, NY 11944
Phone: (631) 477-1493
Fax: (516) 487-2508
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Franklin Square US Post Office

867 Hempstead Turnpike
Franklin Square - 11010
(516) 437-6647

Williston Park US Post Office

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

Lake Grove US Post Office

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

Fair Harbor US Post Office

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

West Islip US Post Office

480 Union Blvd
West Islip - 11795
(631) 669-5157

Wheatley Heights US Post Office

6 Colonial Springs Road
Wheatley Heights - 11798
(631) 643-3913

Smithtown US Post Office

25 Route 111
Smithtown - 11787
(631) 360-6709

Rocky Point US Post Office

346 Route 25a # 84
Rocky Point - 11778
(631) 744-0635

Brookhaven US Post Office

2512 Montauk Highway
Brookhaven - 11719
(631) 286-1591

Old Westbury US Post Office

1 Store Hill Road # A
Old Westbury - 11568
(516) 626-5247