| Jurisdiction: | Diocese |
| Long Xuyên | |
| Latin: | Dioecesis Longxuyensis |
| Local: | Giáo phận Long Xuyên |
| Country: | Vietnam |
| Province: | Sài Gòn |
| Area Km2: | 10,243 |
| Population: | 4,356,037 |
| Population As Of: | 2021 |
| Catholics: | 233,018 |
| Catholics Percent: | 5.3 |
| Parishes: | 164 |
| Established: | 24 November 1960 |
| Cathedral: | Queen of Peace Cathedral, Long Xuyên |
| Patron: | Mary, Mother of God |
| Priests: | 285 |
| Bishop: | Joseph Trần Văn Toản |
| Metro Archbishop: | Joseph Nguyễn Năng |
| Suffragan: | for one --> |
| Archdeacon: | for one--> |
| Emeritus Bishops: | Joseph Trân Xuân Tiéu |
| Website: | Website of the Diocese |
The diocese of Long Xuyên (Latin: Dioecesis Longxuyensis) is a Latin Catholic diocese of Vietnam. The bishop is Joseph Trân Xuân Tiéu, since 2003.
The creation of the diocese in present form was declared November 24, 1960.
The diocese covers an area of 10,243 km², and is a suffragan diocese of the Archdiocese of Ho Chi Minh city.
By 2016, the diocese of Long Xuyên had about 247,000 believers (5.9% of the population), 275 priests and 186 parishes.[1]
Queen of Peace Cathedral in Long Xuyên town has been assigned as the cathedral of the diocese.[2]