Ivanhoe is a romantic opera in three acts based on the 1819 novel by Sir Walter Scott, with music by Sir Arthur Sullivan and a libretto by Julian Sturgis. It premiered at the Royal English Opera House on 31 January 1891 for a consecutive run of 155 performances, a record for a grand opera. Later that year it was performed six more times, making a total of 161 performances. It was toured by Carl Rosa Opera Company in 1894–1895 but has rarely been performed since. The first complete, fully professional recording was released in 2010 on the Chandos Records label.

Ivanhoe: A Romance by Walter Scott is a historical novel published in three volumes, in December 1819, as one of the Waverley novels. It marked a shift away from Scott's prior practice of setting stories in Scotland and in the more recent past. It became one of Scott's best-known and most influential novels.