Susannah is an opera in two acts by the American composer Carlisle Floyd, who wrote the libretto and music while a member of the piano faculty at Florida State University. Floyd adapted the story from the Apocryphal tale of Susannah and the Elders, though the latter story has a more positive ending. The story focuses on 18-year-old Susannah Polk, an innocent girl who is targeted as a sinner in the small mountain town of New Hope Valley, in the Southern American state of Tennessee.

The opera was awarded the New York Music Critics Circle Award for Best New Opera in 1956 and was chosen to represent American music and culture at the World's Fair at Brussels in 1958. This 1994 recording stars Cheryl Studer, Samuel and Jerry Hadley. Kent Nagano conducts.