Ivan Ira Esme Morris (29 November 1925 – 19 July 1976) was a British author and teacher in the field of Japanese Studies.

Ivan Morris was born in London, of mixed American and Swedish parentage, to Ira Victor Morris and Edita Morris. He studied at Gordonstoun, before graduating from Phillips Academy. He began his study of Japanese language and culture at Harvard University, where he received a BA. He received a doctorate at the School of Oriental and African Studies in London. He wrote widely on modern and ancient Japan and translated numerous classical and modern literary works. Ivan Morris was one of the first interpreters sent into Hiroshima after the explosion of the bomb.