Marcel Walz (born May 18, 1986) is a German director, screenwriter, and producer of horror films. After starting his career directing independent genre and splatter films in Germany in the late 2000s, he gained wider international distribution through the films Seed 2: New Breed (2014) and Blood Feast (2016), the official remake of Herschell Gordon Lewis's 1963 splatter classic.

Moving into American genre film production, Walz co-founded the production company Neon Noir Films. His directorial feature credits include Root (2018), Blind (2019), Pretty Boy (2021), That's All (2023), and Rough 1976.