| Jurisdiction: | Diocese |
| Border: | Catholic |
| Tagum | |
| Latin: | Dioecesis Tagamna |
| Local: | Diócesis sa Tagum Diyosesis ng Tagum |
| Coat: | Diocese of Tagum Coat of arms.svg |
| Coat Size: | 150px |
| Country: | Philippines |
| Province: | Davao |
| Metropolitan: | Davao |
| Coordinates: | 7.441°N 125.7999°W |
| Area Km2: | 8,129 |
| Population: | 1,892,604 |
| Population As Of: | 2021 |
| Catholics: | 1,384,000[1] |
| Parishes: | 89 |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | January 13, 1962 (As Prelature) October 11, 1980 (As Diocese) |
| Cathedral: | Cathedral of Christ the King |
| Patron: | Christ the King |
| Patron Title: | Titular patron |
| Priests: | 106 |
| Bishop: | Medil Sacay Aseo |
| Metro Archbishop: | Romulo Valles |
| Suffragan: | for one --> |
| Archdeacon: | for one--> |
The Diocese of Tagum (Latin: Dioecesis Tagamna) is a Latin Church diocese of the Catholic Church in the Philippines.[2] It is a suffragan of the Archdiocese of Davao. It was canonically erected as Prelature Nullius on January 13, 1962, by Pope John XXIII, with Joseph Regan M.M. as its local ordinary. It was elevated to the status of a diocese on October 11, 1980, by Pope John Paul II, who appointed Pedro Dean as its first Filipino bishop ordinary, and Ramon Villena as the auxiliary bishop.
The diocesan territory comprises the entire civil provinces of Davao del Norte (except the city of Samal, the southern portion of the Lasang River) and Davao de Oro.
At the moment there is only one religious institute of men present in the diocese. These are the missionary priests who operate a school in Tagum City. They are called Congregation of the Schools of Charity "Cavanis Fathers" (CSCH) which is housed at Letran de Davao High School, Seminary Drive, Tagum City.
| Bishop | Period in Office | Coat of Arms | |||
|---|---|---|---|---|---|
| 1. | Joseph William Regan, M.M. | 1962–1980 | |||
| 2. | 1980–1985 | ||||
| 3. | Wilfredo Dasco Manlapaz | 1986–2018 | |||
| 3. | Medil Sacay Aseo | 2018 - Present | |||