| Jurisdiction: | Diocese |
| Busan | |
| Latin: | Dioecesis Busanensis |
| Local: | 부산교구 |
| Coat: | Roman Catholic Diocese of Busan (logo).png |
| Territory: | Busan and Ulsan |
| Province: | Daegu |
| Metropolitan: | Daegu |
| Area Km2: | 3,267 |
| Population: | 5,613,436 |
| Population As Of: | 2017 |
| Catholics: | 454,890 |
| Catholics Percent: | 8.1 |
| Parishes: | 124 |
| Denomination: | Catholic |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | January 21, 1957 (As Apostolic Vicariate) March 10, 1962 (As Diocese) |
| Cathedral: | Namcheon Cathedral of St. Paul Chong Hasang |
| Cocathedral: | Jungang Co-Cathedral of the Holy Cross |
| Bishop: | Joseph Son Sam-seok |
| Bishop Title: | Bishop |
| Metro Archbishop: | Thaddeus Cho Hwan-kil |
| Auxiliary Bishops: | Pius Sin Hozol |
| Emeritus Bishops: | Paul Hwang Chul-soo |
| Map: | Diocese of Busan.svg |
The Roman Catholic Diocese of Busan (Latin: Dioecesis Busanensis) is a diocese of the Latin Church of the Catholic Church located in Busan, South Korea.
On 21 January 1957 Pope Pius XII erected as an Apostolic Vicariate of Busan. It was elevated to a diocese by Pope John XXIII on 10 March 1962.[1] [2]