The Heart of Doreon[1] (also known as In the Heart of Doreon[5] and misspelled as The Heart of Dorean[6]) is a 1921 American silent short Western[1] romantic drama[6] film produced by Cyrus J. Williams and distributed by Pathé Exchange.

It was directed by Robert North Bradbury and stars Tom Santschi and Ruth Stonehouse.

This short film was part of the "Santschi Series", which included the other short films The Honor of Rameriz, The Spirit of the Lake,[1] Lorraine of the Timberlands, and Mother o' Dreams,[3] all of which starred Santschi.

An 8-minute version of the film survives, which has been released by Harpodeon.

After a fight, Doreon mistakenly believes that he has killed Blake.