James Marshall (born January 2, 1967) is an American actor. He is best known for playing James Hurley in the cult television series Twin Peaks (1990–1991) and its 1992 prequel film Twin Peaks: Fire Walk with Me, as well as for his role as PFC Louden Downey in A Few Good Men (1992).

He has appeared in numerous other films, including Cadence (1990), Gladiator (1992), Hits! (1994), Vibrations (1995), All She Ever Wanted (1996), Criminal Affairs (1997), Soccer Dog: The Movie (1999), Luck of the Draw (2000), Down (2001) and Alien Lockdown (2004). He also provided the voice for Kurt in the video game Unlimited Saga. Marshall is married to actress Renee Griffin, with whom he has two sons. In summer 2010 Marshall sued the pharmaceutical company Hoffmann-LaRoche (a unit of Roche Holding AG) for $11 million in damages for injuries which, he claimed, resulted from his taking the drug Accutane.

He claimed he had suffered Accutane-related gastrointestinal distress so severe that it necessitated a four-month hospital stay, and the surgical removal of his colon. He asserted that these injuries had derailed his acting career. Stars Martin Sheen (a longtime family friend), Brian Dennehy, Esai Morales and Rob Reiner (Marshall's director on A Few Good Men) were to testify on his behalf. His health now substantially improved, Marshall has begun a new phase of his career, as a guitarist, songwriter and recording artist.