The Apostolic Prefecture of New Holland was a short-lived (1816–1819) Roman Catholic missionary jurisdiction in colonial Australia.
History
It was established in 1816 as an Apostolic Prefecture (missionary pre-diocesan jurisdiction; exempt, i.e. directly subject to the Holy See, not part of any ecclesiastical province) in Australia, a territory split off from the then Apostolic Vicariate of London District (in still missionary England; of a higher pre-diocesan rank, entitled to a titular bishop).
No incumbent available.
On 4 April 1819, it was suppressed and its territory merged into the then Apostolic Vicariate of Cape of Good Hope and adjacent territories (in South Africa, across the Indian Ocean; now Archdiocese of Cape Town).
In 1834, it would be de facto restored (still from the Cape Vicariate) as Apostolic Vicariate of New Holland and Van Diemen's Land, the precursor of the present Metropolitan Roman Catholic Archdiocese of Sydney.