Thomas William Croke D.D. was the second Catholic Bishop of Auckland, New Zealand (1870–74) and later Archbishop of Cashel and Emly in Ireland. He was important in the Irish nationalist movement especially as a Champion of the Irish National Land League in the 1880s. The main Gaelic Athletic Association stadium in Dublin is named Croke Park, in his honour.

The Diocese of Auckland is a Latin Church ecclesiastical territory or diocese of the Catholic Church in New Zealand. It was one of two dioceses in the country that were established on 20 June 1848. Auckland became a suffragan diocese of the Archdiocese of Wellington in 1887. A large area of the diocese south of Auckland was split from the diocese on 6 March 1980 to form the Diocese of Hamilton. As of 2021, almost 40 per cent of New Zealand’s 471,000 Catholics lived within the diocese of Auckland.