Marcel Walz (born May 18, 1986) is a German-born horror film director, writer, and producer. Beginning his career directing independent genre and splatter films in Germany during the late 2000s, he achieved wider international distribution with Seed 2: The New Breed (2014) and Blood Feast (2016), an official remake of Herschell Gordon Lewis's 1963 splatter classic.

After transitioning to American genre filmmaking, Walz co-founded the production company Neon Noir Films. His feature directorial credits include Rootwood (2018), Blind (2019), Pretty Boy (2021), That's a Wrap (2023), and Brute 1976.