Sadko (Russian: Садко, the name of the main character) is an opera in seven scenes by Nikolai Rimsky-Korsakov. The libretto was written by the composer, with assistance from Vladimir Belsky, Vladimir Stasov, and others. Rimsky-Korsakov was first inspired by the Bylina of Sadko in 1867, when he completed a tone poem on the subject, his Op. 5. After finishing his second revision of this work in 1891, he decided to turn it into a dramatic work.

Librettist Vladimir Belsky, Vladimir Stasov, and others (Based on Folk Tales)
Date of composition 1896
Premiered 1898, January 7th (Solodovnikov Theatre) in Moscow, Russia
Type Opera
Approx. duration 170 minutes
Spoken language Russian
Instruments Voice (Tenor) - Foma Nazarich, doyen, elder of Novgorod
Voice (Bass) - Luka Zinovich, governor, elder of Novgorod
Voice (Tenor) - Sadko, gusli-player and singer in Novgorod
Voice (Mezzo-Soprano) - Lyubava Buslayevna, Sadko's young wife
Voice (Contralto) - Nezhata, young gusli-player from Kiev
Voice (Bass) - Duda, skomorokh (actor)
Voice (Tenor) - Sopel, skomorokh (actor)
Voice (Bass) - The Varangian, overseas guest
Voice (Tenor) - The Indian, overseas guest
Voice (Baritone) - The Venetian, overseas guest
Voice (Bass) - Ocean-Sea, the Sea King
Voice (Soprano) - Volkhova, the beautiful princess; Ocean-Sea's youngest, favorite daughter
Voice (Baritone) - The Apparition, a mythic mighty warrior in the guise of a pilgrim
Chorus/Choir - Merchants of Novgorod, wandering minstrels, sailors, maidens, inhabitants of the undersea kingdom, people
Orchestra - Merchants of Novgorod, wandering minstrels, sailors, maidens, inhabitants of the undersea kingdom, people
Autotranslations beta Nikolaï Rimski-Korsakov: Sadko
Nikolaj Andreevič Rimskij-Korsakov: Sadko
Nikolai Andrejewitsch Rimski-Korsakow: Sadko