Robert Williams (born March 2, 1943) is an American painter, cartoonist, and founder of Juxtapoz Art & Culture Magazine. Williams was one of the group of artists who produced Zap Comix, along with other underground cartoonists, such as Robert Crumb, S. Clay Wilson, and Gilbert Shelton. His mix of California car culture, cinematic apocalypticism, and film noir helped to create a new genre of psychedelic imagery.
Known collectors of his art include Nicolas Cage, Leonardo DiCaprio, Artie Shaw, Debbie Harry, Anthony Kiedis, Von Dutch, Stanislav Szukalski, Ed Ruscha, and Timothy Leary. He currently lives in the San Fernando Valley in California with his wife Suzanne, who is also a professional artist.