Káťa Kabanová (also known in various spellings including Katia, Katja, Katya, and Kabanowa) is an opera in three acts, with music by Leoš Janáček to a libretto by Vincenc Červinka, based on The Storm, a play by Alexander Ostrovsky. The opera was also 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. Káťa Kabanová is a clear response to Janáček's feelings for Kamila, and the work is dedicated to her. The first performance was in Brno on 23 November 1921.
The opera has had a complex publication history. František Neumann, the conductor of the opera's first performance, made changes that were incorporated into the 1922 Universal Edition, the first publication of the score. The conductor Václav Talich later produced a "re-orchestrated" version of the score. In 1992, Sir Charles Mackerras published a critical edition of the opera.