| City | Churches |
| Aitape, West Sepik |  St. Ignatius Cathedral  |
| Alotau, Milne Bay | Cathedral of the Sacred Heart of Jesus |
| Bereina, Central | Our Lady of the Sacred Heart Cathedral |
| Buka, Bougainville | Our Lady of the Assumption Cathedral |
| Daru, Western |  St. Louis de Montfort Co-Cathedral |
| Goroka, Eastern Highlands | Mary Help of Christians Cathedral |
| Kavieng, New Ireland | Our Lady of the Sacred Heart Cathedral |
| Kerema, Gulf | Holy Spirit Cathedral |
| Kimbe, West New Britain | Cathedral of Sts. Peter and Paul |
| Kiunga, Western | St. Gerard’s Cathedral |
| Kundiawa, Chimbu | Mary Help of Christians Cathedral |
| Lae, Morobe | St Mary’s Cathedral |
| Madang, Madang | Holy Spirit Cathedral |
| Mendi, Southern Highlands | Mother of the Divine Shepherd Cathedral |
| Mount Hagen, Western Highlands | Holy Trinity Cathedral |
| Port Moresby, National Capital District | St. Mary’s Cathedral |
| Rabaul, East New Britain | St Francis Xavier’s Co-Cathedral |
| Sangurap, Enga | Good Shepherd Cathedral |
| Tubiana, Bougainville |  Church of St. Michael the Archangel |
| Vanimo, West Sepik |  Holy Cross Pro-Cathedral |
| Vunapope, East New Britain | Sacred Heart Cathedral |
| Wewak, East Sepik | Christ the King Cathedral |
