The Propaganda Fide Office has a two-prong purpose:
- to promote mission awareness among the people of the Diocese of Corpus Christi, and
- to collect funds for the support of the missions.
For this purpose, the office represents two Pontifical Mission Aid Societies at the diocesan level, which are the Society for the Propagation of the Faith and Holy Childhood Association. It also represents Catholic Relief Services, which is the international arm of the Catholic Church in the U.S. In addition, the office coordinates the Missionary Cooperative Plan, which enables missionaries from around the world to visit parishes for mission appeals; provides information to lay people, both individuals and groups, interested in short or long-term mission experiences, linking them with existing mission efforts.