The Catholic Church in Hong Kong, established in 1841, is part of the worldwide Catholic Church, under the spiritual leadership of the Pope in Rome. All Catholics in Hong Kong are under the Diocese of Hong Kong, which is a de jure suffragan diocese of the Archdiocese of Guangzhou. However, in practice it is an immediate subject of the Holy See.

John Tong Hon is a prelate of the Catholic Church from Hong Kong. A cardinal since 2012, he was auxiliary bishop of Hong Kong from 1996 to 2008, then coadjutor bishop of the diocese for a year, and Bishop of Hong Kong from 2009 to 2017. In January 2019, he became the apostolic administrator of the diocese, in a caretaker role, after the death of his successor, Michael Yeung.