The Mark of the Whistler, aka The Marked Man, is a 1944 American mystery film noir based on the radio drama The Whistler. Directed by William Castle, the production features Richard Dix, Porter Hall and Janis Carter. It is the second of Columbia Pictures' eight "Whistler" films produced in the 1940s, all but the last starring Dix.

Plot: A drifter claims the money in an old bank account by impersonating someone else with the same name. Soon he finds himself the target of a man who turns out to be the son of the old partner of the impersonated man's father, who caused his partner to do time in prison.