Mary Chase (née Mary Agnes McDonough Coyle; February 25, 1906 – October 20, 1981) was an American journalist, playwright and children's novelist, known primarily for writing the 1944 Broadway play Harvey, which was adapted into the 1950 film starring James Stewart. She wrote fourteen plays, two children's novels, and one screenplay, and worked seven years at the Rocky Mountain News as a journalist. Three of her plays were made into Hollywood films: Sorority House (1939), Harvey (1950), and Bernardine (1957).