On 11 October 1956, Fox was appointed Auxiliary Bishop of Melbourne and Titular Bishop of
Rhinocorura. He was consecrated a bishop on 20 January 1957 by Archbishop Justin Daniel Simonds at St Patricks Cathedral, Melbourne. As bishop, he was a strong supporter of
B. A. Santamaria. in 1960, he declared that a Catholic in good conscience could not vote for the
Australian Labor Party because of its failure to oppose the Communist Party of Australia. While he had enjoyed a strong influence under the leadership of Archbishop Mannix, following his death in 1963 and the appointment of Archbishop Justin Simons, his influence waned. He attended some sessions of the
Second Vatican Council however his influence here was limited too.
Bishop of Sale On 29 November 1967, Fox was appointed
Bishop of Sale by Pope Paul VI. He was installed as the fifth Bishop of Sale on 31 January 1968. He was a consistent campaigner for government funding of Catholic schools, particularly amid an expansion of the Catholic education system and the transition of teaching and schools from religious orders to lay staff. During visits to parishes, he was consistently speaking out against communism, abortion, and artificial contraception. Fox made a strong contribution to the Diocese during his 13 year episcopate. He helped open a fund to support the education of priests in the Diocese. Seven priests were ordained for Sale under his episcopate and six more which had entered seminary during his time were ordained in the years following his retirement. ==Retirement and Death==