The Catholic Church in Vietnam is part of the worldwide Catholic Church, under the spiritual leadership of bishops in Vietnam who are in communion with the Pope in Rome. Vietnam has the fifth largest Catholic population in Asia, after the Philippines, India, China and Indonesia. There are about 7 million Catholics in Vietnam, representing 7.4% of the total population. There are 27 dioceses with 2,228 parishes and 2,668 priests. The main liturgical rites employed in Vietnam are those of the Latin Church.

Vietnamese Martyrs or Saint Andrew Dung-Lac and Companions, also known as the Martyrs of Annam, Martyrs of Tonkin and Cochinchina, Martyrs of Indochina, are saints on the General Roman Calendar who were canonized by Pope John Paul II. On June 19, 1988, thousands of Overseas Vietnamese worldwide gathered at the Vatican for the Celebration of the Canonization of 117 Vietnamese Martyrs, an event chaired by Monsignor Trần Văn Hoài. Their memorial is on November 24.