Mount Sinai is a hamlet and census-designated place located on the North Shore of Long Island, within the Town of Brookhaven in Suffolk County, New York. Known for its scenic harbor on the Long Island Sound, its charming downtown area with local shops and restaurants, and its proximity to the beautiful beaches of the North Shore, Mount Sinai offers a blend of coastal living and a strong sense of community. It is also home to the Mount Sinai Medical Center, a major healthcare provider on Long Island.