The diocese of Lạng Sơn and Cao Bằng (Latin: Dioecesis Langsonensis et Caobangensis) is a Roman Catholic diocese in northern Vietnam's Lạng Sơn and Cao Bằng provinces.
Joseph Chau Ngoc Tri (vn) was appointed in 2016 as the diocese's bishop.[5]
The creation of the diocese in its present form was declared on 24 November 1960. The diocese covers an area of 17,815 km2, and is a suffragan diocese of the Archdiocese of Hanoi. By 2004, the diocese had 6,078 believers (0.5% of the population), 4 priests and 11 parishes.[6] Saint Dominic Cathedral in Lạng Sơn has been assigned as the Cathedral of the diocese.[7] In June 2007, fifty deacons were officially ordained in Lạng Sơn.
Ordinaries
Prefects apostolics of Lang Són et Cao Bang (1913-1939)
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