World Mission Sunday is a day set aside by the Catholic Church throughout the world to publicly renew its commitment to the missionary movements, coordinated by the Pontifical Mission Societies, also known as Missio. The day is celebrated on the penultimate (second-last) Sunday of October every year, (; ). It was created by Pope Pius XI in 1926 as the day of prayer for missions.
Background The work of the Catholic Missions is considered an ongoing task for the whole Church. For this reason, the World Mission Sunday efforts are also a time to remember the last words of Jesus to his faithful. Matthew's Gospel records the final directive of Jesus to his disciples as follows:
World Mission Sunday traces its roots to Blessed Pauline Jaricot, a 19th-century French laywoman who mobilized prayer and support for the Church's missionary efforts. Her first fundraising circles helped support the Church in the United States — then a mission territory itself — until 1908. Today, U.S. Catholics return that generosity by supporting the missionary work of the Church throughout Africa, Asia, Oceania, Latin America, and parts of Europe and the Middle East.
Established in 1926 by Pope Pius XI, World Mission Sunday is coordinated by the Society for the Propagation of the Faith, one of the four Pontifical Mission Societies.
Objectives World Mission Sunday is the one Sunday each year when the entire Catholic Church comes together in prayer, reflection, and sacrificial giving for the missions. On that day, there is a global collection taken in every parish, in every diocese, in every country for the support of the missions.
The annual celebration has been codified by the Catholic Church in Canon Law 791:
Can. 791 To foster missionary cooperation in individual dioceses: missionary vocations are to be promoted; a priest is to be designated to promote effectively endeavors for the missions, especially the Pontifical Missionary Works; an annual day for the missions is to be celebrated; a suitable offering for the missions is to be contributed each year and sent to the Holy See.
This makes the annual collection for the missionary work of the Church the only canonically mandated collection.
Its purpose is to sustain more than 1,124 mission territories — places where the Church is young, often materially poor, and sometimes persecuted, but where the seed of the Gospel is being planted and nourished.
The Society for the Propagation of the Faith provides support for pastoral and catechetical programs, church construction, healthcare, and education in mission territories.
The theme chosen by Pope Leo XIV for 2026, is "One in Christ, united in mission". This theme centers on unity in faith and a shared missionary calling, marking the 100th anniversary of the first World Mission Sunday. Pope Leo XIV, on June 1, 2026, said: "Thanks to the funds raised on World Mission Sunday, the Pontifical Society of the Propagation of the Faith is able to provide necessary help to the over 1,130 ecclesiastical circumscriptions that depend on the Dicastery for Evangelization, Section for First Evangelization and New Particular Churches, to help them establish necessary ecclesiastical infrastructures and support diverse missionary initiatives."
Leo is the first pontiff to ever record a personal video message for World Mission Sunday. This was done in part because he was a missionary himself in Peru.
Impact Every year, the Vatican gathers together to discuss the use of the funds raised globally.
Pope Leo said in June 2026:
Thanks to the generosity of Catholics in the United States, in 2024, World Mission Sunday helped the following:
Missionary dioceses World Mission Sunday supports 1,130 mission dioceses around the world. These mission dioceses are home to 40% of all Catholic seminarians worldwide. Funds raised are used to underwrite the basic physical footprint that keeps missionary work going: buildings where priests live, seminaries where seminarians are formed, diocesan centers where formation and pastoral work can happen, and churches where Holy Mass can be celebrated, often for the first time.
Catholic seminarians In 2025, the Pontifical Mission Societies supported the formation of 87,498 seminarians, fully 41% of all Catholic seminarians worldwide. World Mission Sunday plays a pivotal role in helping Catholic seminarians worldwide. The Society for the Propagation of the Faith, which oversees the funds from World Mission Sunday, works closely with the Society of St. Peter the Apostle, which is another one of the Pontifical Mission societies. Some of the funds raised on World Mission Sunday are used to build, expand, and renovate seminaries in mission dioceses. The funds raised for the Society of St. Peter the Apostle are used to cover the daily operations and running costs of these seminaries. In 2024, the World Mission Sunday funds helped build, expand, and/or renovate 44 seminaries located in mission territories.
Religious Sisters The World Mission Sunday collection helps sustain the work of over 250,000 religious sisters, which accounts for roughly 50% of all religious sisters in the world. These women chose to live in harsh conditions, on the front lines, helping the missionary work of the Church to continue.
Missionary catechists The World Mission Sunday collection helps train over 840,000 missionary catechists a year. With few priests and expansive mission dioceses, the priests cannot be present everywhere at once. Thus, lay missionary catechists are the vital link between the people in the region and their pastors. These men and women gather the people, preach the Gospel, and prepare the faithful to receive the sacraments.
Church infrastructure In an average year, World Mission Sunday helps to fund over 900 infrastructure-related projects for the Church. In 2024 alone, 751 new churches were built.
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