11 Harrowhouse is a 1974 British film directed by Aram Avakian. It was adapted by Charles Grodin based upon the novel by Gerald A. Browne with the screenplay by Jeffrey Bloom. It stars Charles Grodin, Candice Bergen, James Mason, Trevor Howard and John Gielgud.

The film has been screened in two versions in the past - both with and without a retrospective commentary from Grodin's character, H.R. Chesser. Only the version without commentary seems to be widely available in published form, and neither version seems to have been screened to great extent on TV, though the original version with commentary holds up very well today.