The Trial of Mary Dugan may refer to:
- The Trial of Mary Dugan (play), a 1927 play by Bayard Veiller
- The Trial of Mary Dugan (1929 film), an American pre-Code film, based on the play
- The Trial of Mary Dugan (1931 film), an American drama film, based on the play
- The Trial of Mary Dugan (1941 film), an American drama and thriller film, based on the play
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