Jurisdiction | Cathedral | Type |
| Bangkok | Cathedral of the Assumption of the Blessed Virgin Mary Bangkok, Krung Thep Maha Nakhon Bangkok, Thailand |  Cathedral |
| Chanthaburi | Cathedral of the Immaculate Conception Chanthaburi, Chanthaburi, Thailand | Cathedral |
| Chiang Mai | Chiang Mai, Chiang Mai, Thailand | Cathedral |
| Chiang Rai | Cathedral of the Nativity of Our Lady Chiang Rai, Chiang Rai, Thailand | Cathedral |
| Nakhon Ratchasima | Nakhon Ratchasima, Nakhon Ratchasima, Thailand | Cathedral |
| Nakhon Sawan | Nakhon Sawan, Nakhon Sawan, Thailand | Cathedral |
| Ratchaburi | Nativity of Our Lady Cathedral Amphoe Bang Khonthi, Samut Songkhram, Thailand | Cathedral |
| Surat Thani | Surat Thani, Surat Thani, Thailand | Cathedral |
| Thare and Nonseng | St. Michael the Archangel Cathedral Tha Rae, Sakon Nakhon, Thailand | Cathedral |
| Thare and Nonseng | Mueang Nakhon Phanom, Nakhon Pathom, Thailand |  Co-Cathedral |
| Ubon Ratchathani | Cathedral of the Immaculate Conception Ubon Ratchathani, Ubon Ratchathani, Thailand | Cathedral |
| Udon Thani | Cathedral of Our Mother of Perpetual Help Udon Thani, Udon Thani, Thailand | Cathedral |
