Port Washington is a hamlet and census-designated place (CDP) in Nassau County, New York on the North Shore of Long Island. As of the United States 2010 Census, the community population was 15,846.
In the 1870s Port Washington became an important sand-mining town; it had the largest sandbank east of the Mississippi, and easy barge access to Manhattan. Some 140 million cubic yards of local sand were used for concrete for New York skyscrapers like the Empire State and Chrysler buildings, according to Jon Kaiman, the Town Supervisor until 2013. Fifteen years ago the sand mines were redeveloped as Harbor Links, a golf course for North Hempstead residents.Port Washington is depicted as the area of East Egg in F. Scott Fitzgerald's novel, The Great Gatsby.The Thomas Dodge Homestead, Execution Rocks Light, Gould-Guggenheim Estate, William Landsberg House, Main Street School, Monfort Cemetery, Sands-Willets Homestead, and John Philip Sousa House are listed on the National Register of Historic Places.The Knickerbocker Yacht Club is a yacht club in Port Washington for over 100 years.