| Jurisdiction: | Diocese |
| Ðà Lat | |
| Latin: | Dioecesis Dalatensis |
| Local: | Giáo phận Ðà Lạt |
| Coat: | Coat of arms of Dominic Nguyễn Văn Mạnh.svg |
| Coat Size: | 200px |
| Coat Caption: | The coat of arms of Bishop Mạnh |
| Province: | Sài Gòn |
| Area Km2: | 9,764 |
| Population: | 1,169,925 |
| Population As Of: | 2006 |
| Catholics: | 299,339 |
| Catholics Percent: | 25.6 |
| Denomination: | Catholic |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | 24 November 1960 |
| Cathedral: | Cathedral of Saint Nicholas of Bari |
| Patron: | Our Lady of the Rosary |
| Bishop: | Dominic Nguyễn Văn Mạnh |
| Metro Archbishop: | Joseph Nguyễn Năng |
| Suffragan: | for one --> |
| Archdeacon: | for one--> |
| Emeritus Bishops: | Antoine Vũ Huy Chương |
The Diocese of Đà Lat (Latin: Dioecesis Dalatensis|links=no) is a Latin suffragan diocese of Roman Catholic church in the ecclesiastical province of the Metropolitan of the Archdiocese of Ho Chi Minh City in southern Vietnam, yet depends on the missionary Dicastery for Evangelization. Its cathedral episcopal see is Cathedral of Saint Nicholas of Bari, in the southern city of Da Lat, Lâm Đồng Province, Central Highlands.
Its present Bishop is Dominic Nguyễn Văn Mạnh, since September 16, 2019.
As per 2014, it pastorally served 368,487 Catholics (27.8% of 1,325,000 total) on 9,764 km2 in 87 parishes and 16 missions with 259 priests (143 diocesan, 116 religious), 1,413 lay religious (501 brothers, 912 sisters) and 69 seminarians. Many of its faithful belong to ethnic minorities.