Baldwin US Post Office

2260 Grand Avenue
Baldwin, NY 11510
Phone: (516) 223-5024
Fax: (516) 223-7420
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Mill Neck US Post Office

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

Holtsville US Post Office

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

Port Jefferson Station US Post Office

544 Jefferson Placeaza
Port Jefferson Station - 11776
(631) 473-2751

Greenport US Post Office

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

North Baldwin US Post Office

1620 Grand Avenue
North Baldwin - 11510
(516) 223-5710

East Setauket US Post Office

450 Route 25a
East Setauket - 11733
(631) 941-4005

Kings Point US Post Office

300 Steamboat Road
Kings Point - 11024
(516) 773-5298

Central Islip US Post Office

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

Port Jefferson US Post Office

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

Westbury US Post Office

360 Maple Avenue
Westbury - 11590
(516) 333-3598