Lists of operas cover operas, a form of theatre in which music is essential, and the roles are portrayed by singers. There are general lists and lists by theme, country, medium and venue.

General

• List of operas by composer
• List of prominent operas
• List of operas by title

By theme

• List of operettas
• List of Christmas operas
• List of operas set in the Crusades
• List of Orphean operas
• Science fiction opera

By country

• List of Argentine operas
• List of Mexican operas
• List of North Korean operas

By medium

• List of radio operas
• List of television operas

By venue

• Glyndebourne Festival Opera: history and repertoire, 1934–51
• Glyndebourne Festival Opera: history and repertoire, 1952–63
• List of Innsbruck Festival of Early Music productions
• List of performances of French grand operas at the Paris Opéra
• Salzburg Festival: history and repertoire, 1922–1926
• Salzburg Festival: history and repertoire, 1935–1937
• List of operas performed at the Santa Fe Opera
• List of works premiered at the Teatro Capranica
• Repertory of the Vienna Court Opera under Gustav Mahler
• List of operas performed at the Wexford Festival

This article includes an entertainment-related list of lists.