Operas
- Pagliacci – 21 May 1892, Teatro Dal Verme, Milan.
- I Medici – 9 November 1893, Teatro Dal Verme, Milan). (The first part of the uncompleted trilogy, Crepusculum.)
- Chatterton – 10 March 1896, Teatro Argentina, Rome. (Revision of a work written in 1876.)
- La bohème – 6 May 1897, Teatro La Fenice, Venice.
- Zazà – 10 November 1900, Teatro Lirico, Milan.
- Der Roland von Berlin – 13 December 1904, Städtische Oper, Berlin.
- Maïa – 15 January 1910, Teatro Costanzi, Rome.
- Zingari – 16 September 1912, Hippodrome, London.
- Mimi Pinson – 1913, Teatro Massimo, Palermo. (Revision of La bohème.)
- Goffredo Mameli – 27 April 1916, Teatro Carlo Felice, Genoa. (Note that the Fondazione Leoncavallo classes this as an opera rather than an operetta.)
- Edipo Re – 13 December 1920, Chicago Opera. (Produced after the composer's death, orchestration not by Leoncavallo, completed by Giovanni Pennacchio)
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