Threepenny Opera or Three Penny Opera may refer to:
- The Threepenny Opera, a 1928 German "play with music" by Bertolt Brecht
- The Threepenny Opera (film), a 1931 film adaptation
- Three Penny Opera, a 1963 German film adaptation directed by Wolfgang Staudte
- Mack the Knife (1989 film), a 1989 film adaptation of the 1928 musical starring Raúl Juliá, Richard Harris