Giulio Serafini (12 October 1867 – 16 July 1938) was an Italian prelate of the Catholic Church who was made a cardinal in 1930. He served as Prefect of the Congregation of the Council from 1930 until his death in 1938, after serving as the Commission's secretary from 1923 to 1930. He also led the Pontifical Commission for the Authentic Interpretation of the Code of Canon Law from 1936 to 1938.