Marin Karmitz (born 7 October 1938) is a Romanian-French businessman whose career has spanned the French film industry, including director, producer, film distributor, and operator of a chain of cinemas.

He comes from an assimilated Jewish-Romanian family and emigrated to France in 1948. Karmitz attended film school at IDHEC (renamed La Fémis) and worked as a director of photography after graduating.

Karmitz founded MK2, a production company and movie theater chain, which has specialized in creating, distributing, and screening independent or "auteurist" cinema, including short films.

In 2005, he turned over leadership of the MK2 company and its theaters to his son, Nathanaël.