The Lone Wolf Keeps a Date is a 1940 American mystery crime film directed by Sidney Salkow and starring Warren William, Frances Robinson, Bruce Bennett and Eric Blore. It is the sixth Lone Wolf film produced by Columbia Pictures. It features William in his fourth appearance as the title character and Edward Gargan, Lester Matthews and Don Beddoe as the film's antagonists. The screenplay was written by Salkow and Earl Felton.

The film centers on former jewel thief Michael Lanyard, also known by his alias Lone Wolf, who aims to recover his stamp collection and rescues a damsel in distress. Filming took place in August and September 1940. The Lone Wolf Keeps a Date was released in the United States in January 1941. It was followed by The Lone Wolf Takes a Chance, later that same year.