The Roman Catholic Diocese of Wewak is a suffragan diocese of the Roman Catholic Archdiocese of Madang. It was elevated to a diocese in 1966.

Bishops

Bishops of Wewak

• Camisio Teodoro Gellings, SS.CC. (1913−1918)
• Adalberto Ottone Rielander, SS.CC.(1918−1922)
• Teodosio Heikenrath, (1922-1923)
• Giuseppe Lörks, S.V.D. (1928−1945)
• Leo Clement Andrew Arkfeld, S.V.D. (1948−1975)
• Raymond Kalisz, S.V.D. (1980−2002)
• Anthony Joseph Burgess (2002−2013)
• Józef Roszyński, S.V.D. (2015–present); was Polish religious missionary priest in the Diocese; consecrated and installed 25 April 2015^[1]

Coadjutor bishop

• Anthony Joseph Burgess (2000-2002)

Other priests of this diocese who became bishops

• Michael Marai, appointed Bishop of Goroka in 1988
• Cherubim Alfred Dambui, appointed Auxiliary Bishop of Port Moresby in 2000
• Otto Separy, appointed Auxiliary Bishop of Aitape in 2007