Post Offices in Manhasset, New York, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Manhasset Post Office No Reviews Favorite Fax: (516) 627-5376Phone: (516) 627-0536Retail Hours Plandome Post Office No Reviews Favorite Fax: (516) 627-5376Phone: (516) 627-3747Retail Hours