Unknown Island is a 1948 American adventure film directed by Jack Bernhard and starring Virginia Grey, Phillip Reed and Richard Denning.

Adventure-seeker Ted Osborne (Phillip Reed) and his fiancée Carole (Virginia Grey) are at a cafe in Singapore, looking for a charter to an island supposedly inhabited by dinosaurs.

They decide to talk, and Osborne asks if Tarnowski is willing to give them a charter in his ship to the unknown island.

He had flown over many remote islands, and on one he reported seeing large, moving creatures that looked like Dinosaurs.

As Fairbanks had been drinking incessantly to forget the events of the past since his rescue, his account of the dinosaur island was believed to be the result of alcoholism and insanity.

Since Fairbanks and Osborne's stories collaborated, Tarnowski agrees to allow his ship to be hired, but specifies that no one in the crew be told of their destination.

They sail aboard Tarnowski's ship, heading for weeks in the direction of French Polynesia, where the island is supposed to be located.

The crewman is shot and killed by Tarnowski while the officers focus on driving away the dinosaurs with rifle grenades and explosive bullets.

Carole and Fairbanks are shortly reunited with Osborne and another passenger, and the four break camp and leave the island on Tarnowski's boat.

Stock footage from Unknown Island was used in the American version of Godzilla Raids Again and in Adventure at the Center of the Earth.