Mysterious Island is a 1961 science fiction adventure film about prisoners in the American Civil War who escape in a balloon and then find themselves stranded on a remote island populated by giant and tiny animals.

The Mysterious Island is a novel by Jules Verne, published in 1875. The first edition, published by Hetzel, contains illustrations by Jules Férat. The novel is a crossover sequel to Verne's famous Twenty Thousand Leagues Under the Seas (1870) and In Search of the Castaways (1867–68), though its themes are vastly different from those books. An early draft of the novel, rejected by Verne's publisher and wholly reconceived before publication, was titled Shipwrecked Family: Marooned with Uncle Robinson, indicating the influence of the novels Robinson Crusoe and The Swiss Family Robinson. Verne developed a similar theme in his novel, Godfrey Morgan.