Kristóf Deák (Hungarian pronunciation: [ˈkriʃtoːf ˈdɛaːk]; born June 7, 1982) is a Hungarian film director, screenwriter, film producer and editor who is best known for his work on Sing, which earned him critical appraisal and recognition including the Academy Award for Best Live Action Short Film at the 89th Academy Awards in 2017.

Starting his studies in electrical engineering at the Budapest University of Technology and Economics, he later switched to the University of Theater and Film's film production course. During this time, he learned editing from his classmates, and subsequently worked as a freelance editor.

In 2010, he completed the MA in Film and TV Directing course at the University of Westminster. In 2011, he directed episodes of the popular Hungarian television series Hacktion. In 2017, his short film Sing won the Academy Award for Best Live Action Short Film.