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 features William in his fourth appearance as the title character and Edward Gargan, Lester Matthews and Don Beddoe as the film's antagonists.

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.

[1] After adding a rare Cuban stamp to his coveted collection and admonishing his butler Jamison for winning money in a rigged dice game in Havana, retired jewel thief and unofficial private detective Michael Lanyard (the Lone Wolf), meets gorgeous Patricia Lawrence when she shares their horse-drawn carriage to the airport, to catch the flying boat to Miami.

He concluded that the film made "a good entry in the Lone Wolf series, with less sexual violence this time round.