Riverhead US Post Office

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

2 Center St
Upton - 11973
(631) 344-2539

Lake Grove US Post Office

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

Fishers Island US Post Office

1 Oriental Avenue
Fishers Island - 06390
(631) 788-7835

Central Islip US Post Office

101 Federal Plaza
Central Islip - 11722
(631) 715-0001

Greenport US Post Office

131 Front St
Greenport - 11944
(631) 477-1493

New Hyde Park US Post Office

1001 2nd Avenue
New Hyde Park - 11040
(516) 354-6024

Franklin Square US Post Office

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

Rockville US Post Office

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

Levittown US Post Office

180 Gardiners Avenue
Levittown - 11756
(516) 735-7343

Oakdale US Post Office

927 Montauk Highway
Oakdale - 11769
(631) 589-2683