John Ottman (born July 6, 1964) is an American film editor, composer, and director.

He is best known for his collaborations with film director Bryan Singer, acting as editor and composer for his films The Usual Suspects, Apt Pupil, X2: X-Men United, Superman Returns (including adapting themes originally composed by John Williams), Valkyrie, Jack the Giant Slayer and X-Men: Days of Future Past. Other notable films he worked on as composer are Snow White: A Tale of Terror, the 2005 remake of House of Wax, Kiss Kiss Bang Bang, Fantastic Four and its sequel Fantastic Four: Rise of the Silver Surfer, The Invasion, and Astro Boy.

He also directed (in addition to editing and scoring) the 2000 horror film Urban Legends: Final Cut. He won a BAFTA Award for Best Editing for The Usual Suspects, as well as two Saturn Awards for Best Music for The Usual Suspects and Superman Returns.

Ottman graduated from the School of Cinematic Arts of the University of Southern California in 1988. One of his first assignments was to provide original music for the computer game I Have No Mouth, and I Must Scream. In 2007, Ottman appeared in the documentary Finding Kraftland for his agent Richard Kraft.