The Latin Rite Roman Catholic Diocese of Christchurch is a suffragan diocese of the Roman Catholic Archdiocese of Wellington. Its cathedral and see city are located in Christchurch, the largest city in the South Island of New Zealand. It was formed on 5 May 1887 from a portion of the territory of the Diocese of Wellington, which was elevated to archdiocese later that same month.
Bishop Barry Jones died in February 2016 and his successor has yet to be named.
St Mary's Catholic Church in Hokitika belongs to the diocese. Following a structural assessment triggered by the February 2011 Christchurch earthquake, the church was closed to the public in June 2012.
For 57 years, the diocese was responsible for sending priests to the non-denominational Christian Chapel of the Snows at McMurdo Station on Ross Island, Antarctica, the second southernmost religious building in the world. This practice was stopped in 2015.
Coordinates: 43°32′19″S 172°38′46″E / 43.53861°S 172.64611°E