Major Elizur Yale Smith (1885 – 1950) was an American paper manufacturer, military officer, socialite, author and historian from New York. He served in the American Legion of the Canadian Expeditionary Force during World War I, and became executive secretary of the Federal Hall in Manhattan, which he helped save with a consortium. He was prominent in Newport society during the late Gilded Age, along with his wife, Mrs. Annie Livingston Best, daughter of Col. Clermont L. Best. He was also one of the heirs of his father, millionaire Wellington Smith, and a friend of the Vanderbilts and Roosevelts in New York.