Dorothy Tree (May 21, 1906 – February 13, 1992) born as Dorothy Estelle Triebitz, was an American actress, voice teacher and writer. She appeared in a wide range of character roles in at least 49 films between 1927 and 1951.
Her roles included Martha, mother of Knute Rockne in Knute Rockne, All American, and May Emmerich, the invalid wife of Louis Calhern in The Asphalt Jungle. After being blacklisted as a communist because of the House Un-American Activities Committee (HUAC) hearings, she began a second career as a voice teacher in New York. Emphasizing good diction and clarity, and the subtleties of intonation, she published four books on the subject.