Michael Joseph "Red Mike" Quill (September 18, 1905 – January 28, 1966) was one of the founders of the Transport Workers Union of America (TWU), a union founded by subway workers in New York City that expanded to represent employees in other forms of transit. He served as the President of the TWU for most of the first thirty years of its existence. A close ally of the Communist Party USA (CP) for the first twelve years of his leadership of the union, he broke with it in 1948.