Richard Alden Griffin (June 18, 1944 - August 18, 1991) was an American artist and one of the leading designers of psychedelic posters in the 1960s. As a contributor to the underground comix movement, his work appeared regularly in Zap Comix. Griffin was closely identified with the Grateful Dead, designing some of their best known posters and record jackets. His work within the surfing subculture included both film posters and his comic strip, Murphy.

Griffin was born near Palos Verdes amidst the surfing culture of southern California. Griffin biographer Tim Stephenson notes: "His father was an engineer and amateur archaeologist and as a boy Rick accompanied him on digs in the Southwest. It was during this time th...