Ivanhoe is a historical novel by Sir Walter Scott, first published in 1820 in three volumes and subtitled A Romance. At the time it was written it represented a shift by Scott away from fairly realistic novels set in Scotland in the comparatively recent past, to a somewhat fanciful depiction of medieval England. It has proved to be one of the best known and most influential of Scott's novels.

Ivanhoe is set in 12th-century England, with colourful descriptions of a tournament, outlaws, a witch trial and divisions between Jews and Christians. It has been credited for increasing interest in romance and medievalism; John Henry Newman claimed Scott "had first turned men's minds in the direction of the Middle Ages", while Carlyle and Ruskin made similar assertions of Scott's overwhelming influence over the revival, based primarily on the publication of this novel. It has also had an important influence on popular perceptions of Robin Hood, Richard the Lionheart and King John.

There have been several adaptations for stage, film and television.

Sir Walter Scott, 1st Baronet, FRSE (1771 – 1832) was a Scottish historical novelist, playwright and poet. Many of his works remain classics of both English-language literature and of Scottish literature. Famous titles include Ivanhoe, Rob Roy, Old Mortality, The Lady of the Lake, Waverley, The Heart of Midlothian and The Bride of Lammermoor.

Although primarily remembered for his extensive literary works and his political engagement, Scott was an advocate, judge and legal administrator by profession, and throughout his career combined his writing and editing work with his daily occupation as Clerk of Session and Sheriff-Depute of Selkirkshire.

A prominent member of the Tory establishment in Edinburgh, Scott was an active member of the Highland Society and served a long term as President of the Royal Society of Edinburgh (1820–32).