The diocese of Bùi Chu () is a Roman Catholic diocese of Vietnam. It encompasses 4/5 of Nam ÃÂá»Ânh Province in terms of area, including the six districts of Xuân Trðá»Âng, Giao Thá»§y, Hải HáºÂu, Nghéa Hðng, Trá»±c Ninh, and Nam Trá»±c and part of Nam ÃÂá»Ânh city. The current bishop of the diocese since August 2013 is Thomas Aquinas Và © ÃÂình Hiá»Âu.
Bùi Chu Diocese covers an area of 1,350 km<sup>2</sup>, and is a suffragan diocese of the Archdiocese of Hanoi.
From the late 17th century until 1930s, this was a center of the Spanish Dominican mission in Vietnam. The covering area of Bùi Chu is the same as at present as it has been from 1936, when it still was an apostolic vicariate. It was declared a diocese on November 24, 1960.
By 2018, the Diocese of Bùi Chu had about 409,000 believers (32.8% of the population) in 176 parishes.
The diocese is divided into 13 deaneries: Báo ÃÂáp, Bùi Chu, ÃÂại ÃÂá»Âng, Kiên ChÃÂnh, Lạc ÃÂạo, Liá» u ÃÂá»Â, Ninh Cðá»Âng, Phú Nhai, Quần Phðáng, Quỹ Nhất, Thức Hóa, Tứ Trùng, and Tðáng Nam.
The Queen of the Holy Rosary Cathedral in Xuân Ngá»Âc Commune, Xuân Trðá»Âng District, which has been assigned as the see (the location of the cathedral and its Bishop's chair, and thus the headquarters) of the diocese. There are 12 Shrines in the diocese. The Basilica of Immaculate Conception, Phu Nhai is one of them.
There is a traditional charity centre called NhàDục Anh (Orphanage House) in the northwest side of the Bùi Chu Cathedral.