A Trip to the Moon (French: Le voyage dans la lune) is a 1902 French science-fiction adventure film directed by Georges Méliès. Inspired by a wide variety of sources, including Jules Verne's 1865 novel From the Earth to the Moon and its 1870 sequel Around the Moon, the film follows a group of astronomers who travel to the Moon in a cannon-propelled capsule, explore the Moon's surface, escape from an underground group of Selenites (lunar inhabitants), and return to Earth with a captive Selenite. Méliès leads an ensemble cast of French theatrical performers as the main character Professor Barbenfouillis, in the overtly theatrical style for which he became famous.

Scholars have commented upon the film's extensive use of pataphysical and anti-imperialist satire, as well as on its wide influence on later filmmakers and its artistic significance within the French theatrical féerie tradition. Though the film disappeared into obscurity after Méliès's retirement from the film industry, it was rediscovered around 1930, when Méliès's importance to the history of cinema was beginning to be recognised by film devotees. An original hand-colored print was discovered in 1993 and restored in 2011.

A Trip to the Moon was an internationally popular success on its release and was extensively pirated by other studios, especially in the United States. Its unusual length, lavish production values, innovative special effects, and emphasis on storytelling were markedly influential on other filmmakers and ultimately on the development of narrative film as a whole. It was ranked 84th of the 100 greatest films of the 20th century by The Village Voice. The film remains Méliès' best known, and the moment in which the capsule lands in the Moon's eye remains one of the most iconic and frequently referenced images in the history of cinema. It is widely regarded as the earliest example of the science fiction film genre and, more generally, as one of the most influential films in cinema history.