Gustav Althoff (1885 – 1948) was a German film producer. He was a leading independent producer during the Weimar and Nazi eras, establishing his own Althoff Studios in Berlin in 1939. Originally a cinema-owner in Dortmund before expanding into film distribution, he moved to Berlin in 1920. He founded both his own Aco-Film company, and also co-founded Aafa-Film. He continued producing until the Nazi Party centralised all film production in the early 1940s.