The Metropolitan Cathedral of the Sacred Heart and of Saint Mary His Mother, better known as Sacred Heart Cathedral, is a Roman Catholic cathedral church on Hill Street, Wellington, New Zealand. It is the parish church of the Thorndon Catholic parish and the seat of the Archbishop of Wellington. The New Zealand Parliament is a close neighbour of the cathedral. However, the Thorndon Catholic parish predates that institution. The cathedral is part of a Catholic precinct which includes: St Mary's College; Sacred Heart Cathedral School; St Mary's Convent, the motherhouse of the Sisters of Mercy in Wellington; the Catholic Centre, in which Catholic administration is located; and Viard House, which is both the cathedral parish presbytery and the residence of the archbishop.

Wellington is the capital city of New Zealand. It is located at the south-western tip of the North Island, between Cook Strait and the Remutaka Range. Wellington is the third-largest city in New Zealand, and is the administrative centre of the Wellington Region. It is the world's southernmost capital of a sovereign state. Wellington features a temperate maritime climate, and is the world's windiest city by average wind speed.