Jacques Vallée, French ufologist
Jacques Fabrice Vallée (French: [vale]; born September 24, 1939) is an Internet pioneer, computer scientist, venture capitalist, author, ufologist and astronomer currently residing in San Francisco, California and Paris, France.

His scientific career began as a professional astronomer at the Paris Observatory. Vallée co-developed the first computerized map of Mars for NASA in 1963. He later worked on the network information center for the ARPANET, a precursor to the modern Internet, as a staff engineer of SRI International's Augmentation Research Center under Douglas Engelbart.

Vallée is also an important figure in the study of unidentified flying objects (UFOs), first noted for a defense of the scientific legitimacy of the extraterrestrial hypothesis and later for promoting the interdimensional hypothesis.