Patternmaster (1976) is a science fiction novel by American author Octavia E. Butler. Patternmaster, the first book to be published but the last in the series' internal chronology, depicts a distant future where the human race has been sharply divided into the dominant Patternists, their enemies the "diseased" and animalistic Clayarks, and the enslaved human mutes. The Patternists, bred for intelligence and psychic abilities, are networked telepaths. They are ruled by the most powerful telepath, known as the Patternmaster. Patternmaster tells the coming-of-age story of Teray, a young Patternist who learns he is a son of the Patternmaster. Teray fights for position within Patternist society and eventually for the role of Patternmaster.

Octavia Estelle Butler was an American science fiction author and a multiple recipient of the Hugo and Nebula awards. In 1995, Butler became the first science-fiction writer to receive a MacArthur Fellowship.