Poul Carl Bjerre (24 May 1876 – 15 July 1964) was a Swedish psychiatrist who was a native of Gothenburg. In 1907 he succeeded hypnotist Otto Georg Wetterstrand (1845–1907) at the latter's medical practice in Stockholm. Among his written works was an influential book which theorized on the recurring cycle of "psychic death and renewal" called Död och Förnyelse.He wrote a biography on Friedrich Nietzsche, and is remembered for his written correspondence with Freud and Carl Jung.He died in Vårsta.