Káťa Kabanová is an opera in three acts by Leoš Janáček to a Czech translation by Vincenc Cervinka, first produced in Brno on 23 November 1921. It was based on The Storm, a play by Alexander Ostrovsky, and largely inspired by Janáček's love for Kamila Stösslová. This is often considered his first "mature" opera, despite the fact that he was 67 when it was premiered.
The plot revolves around Káťa, a married woman who has an affair during her husband's absence. While many of the other characters are comparatively weakly portrayed, Káťa herself is provided with the most memorable music and dominates the opera. It ends with her lover's departure and her subsequent suicide.
Káťa Kabanová is a clear response to Janáček's feelings for Kamila, and the work is dedicated to her
The name of the opera and the main character is usually transliterated in English as Káta, Kata or Katya because of the Czech diacritics.