Woolworth Estate, also referred to Winfield Hall, is a historic estate located at Glen Cove in Nassau County, New York. It was designed in 1916 by architect C. P. H. Gilbert (1861–1952) for Frank Winfield Woolworth (1852–1919). The estate consists of the main residence, known as Winfield Hall; a large garage with remodeled living quarters; a main entrance arch; two greenhouses; and various landscape features including a tea house.