| City | Churches |
| Amphoe Bang Khonthi, Samut Songkhram |  Nativity of Our Lady Cathedral  |
| Bangkok, Krung Thep Maha Nakhon Bangkok | Cathedral of the Assumption of the Blessed Virgin Mary |
| Chanthaburi, Chanthaburi | Cathedral of the Immaculate Conception |
| Chiang Mai, Chiang Mai | Sacred Heart Cathedral |
| Chiang Rai, Chiang Rai | Cathedral of the Nativity of Our Lady |
| Mueang Nakhon Phanom, Nakhon Pathom |  St Anne’s Co-Cathedral |
| Nakhon Ratchasima, Nakhon Ratchasima | Our Lady of Lourdes Cathedral |
| Nakhon Sawan, Nakhon Sawan | St. Ann Cathedral |
| Surat Thani, Surat Thani | Cathedral of St. Raphael the Archangel |
| Tha Rae, Sakon Nakhon | St. Michael the Archangel Cathedral |
| Ubon Ratchathani, Ubon Ratchathani | Cathedral of the Immaculate Conception |
| Udon Thani, Udon Thani | Cathedral of Our Mother of Perpetual Help |
