| 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
|
