Pope Julius III (Latin:Iulius III; 10 September 1487 – 23 March 1555), born Giovanni Maria Ciocchi del Monte, was Pope from 7 February 1550 to his death in 1555.

Distinguished as an effective diplomat, he was elected to the papacy as a compromise candidate after the death of Paul III. As pope he made only reluctant and short-lived attempts at reform, mostly devoting himself to a life of personal pleasure. His reputation, and that of the Catholic Church, were greatly harmed by his scandal-ridden relationship with his adopted nephew.