Mary Chase 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.

Harvey is a 1944 play by the American playwright Mary Chase. She received the Pulitzer Prize for Drama for the work in 1945. It has been adapted for film and television several times, most notably in a 1950 film starring James Stewart and Josephine Hull.