Rusalka, Op. 114, is an opera by Antonín Dvořák. His ninth opera (1900–1901), it became his most successful, frequenting the standard repertoire worldwide. Jaroslav Kvapil wrote the libretto on Karel Jaromír Erben's and Božena Němcová's fairy tales. The rusalka is a water sprite from Slavic mythology; it usually inhabits a lake or river.

Antonín Leopold Dvořák was a Czech composer. Dvořák frequently employed rhythms and other aspects of the folk music of Moravia and his native Bohemia, following the Romantic-era nationalist example of his predecessor Bedřich Smetana. Dvořák's style has been described as "the fullest recreation of a national idiom with that of the symphonic tradition, absorbing folk influences and finding effective ways of using them," and Dvořák has been described as "arguably the most versatile... composer of his time".