Maurizio Boch, S. M., Ordinary, (1920–1929)
Thomas James Wade, S. M., Ordinary, (1930–1960)
Leo Lemay, S. M., Ordinary, (1960–1974)
Gregory Singkai, Ordinary, (1974–1996)
Henk Kronenberg, S. M., Ordinary, (1999–2009 )
Bernard Unabali, Ordinary, (2009– )
Roman Catholic Diocese of Bougainville Wikipedia
The Roman Catholic Diocese of Bougainville is a suffragan diocese of the Roman Catholic Archdiocese of Rabaul. It was erected as the Prefecture Apostolic of German Solomon Islands in 1898 and elevated to a Vicariate Apostolic in 1930. It was further elevated in 1966 to the Diocese of Bougainville.