Anthony John King Mussio

Anthony John King Mussio (June 13, 1902—April 15, 1978) was an American prelate of the Roman Catholic Church. He was the first Bishop of Steubenville, Ohio (1945-1977).

John Mussio was born in Cincinnati, Ohio, to John Edward and Blanche (née King) Mussio. After graduating from St. Xavier High School in 1920, he studied at Xavier University, from where he obtained a Bachelor of Arts degree in 1924. He earned a Master of Arts degree from the University of Notre Dame in St. Joseph County, Indiana and, returning to Cincinnati, studied at the College-Conservatory of Music. While serving as an English professor at Xavier University from 1925 to 1930, he also studied law at the University of Cincinnati. He entered St. Gregory Preparatory Seminary in 1930 and afterwards Mount St. Mary's Seminary in 1932.

Mussio was ordained to the priesthood by Archbishop John T. McNicholas, O.P., on August 15, 1935. Furthering his studies in Rome, he earned a doctorate in canon law from the Pontifical University of Saint Thomas Aquinas, Angelicum in 1939 with a dissertation entitled The education of offspring : a primary end or matrimony Following his return to Cinicinnati that year, he became assistant chancellor of the Archdiocese of Cincinnati. He was named chancellor of the archdiocese and a Papal Chamberlain in 1942. In addition to his other duties, he taught canon law at Mount St. Mary's Seminary.