Jurisdiction | Cathedral | Type |
| Athens | Cathedral Basilica of St. Dionysius the Areopagite  Athens (Αθήνα), Attica (Αττική), Greece  |  Cathedral, Minor Basilica |
| Chios | Cathedral of St. Nicolas Chios (Χίος), Northern Aegean (Βόρειο Αιγαίο), Greece |  Cathedral |
| Corfu–Zakynthos–Kefalonia | Cathedral of St. James and St. Christopher Corfu (Κέρκυρα), Ionian Islands (Ιόνια Νησιά), Greece | Cathedral,  World Heritage Site |
| Crete | Cathedral of the Assumption of the Blessed Virgin Mary Chania (Χανιά), Crete (Κρήτη), Greece | Cathedral |
| Greece (Armenian Rite) | Armenian Church of St. Gregory the Illuminator Athens (Αθήνα), Attica (Αττική), Greece |  Cathedral |
| Greece (Greek Rite) | Cathedral of the Holy Trinity Athens (Αθήνα), Attica (Αττική), Greece | Cathedral |
| Naxos–Andros–Tinos–Mykonos | Cathedral of Our Lady of the Rosary Xinara (Ξινάρα), Southern Aegean (Νότιο Αιγαίο), Greece | Cathedral |
| Naxos–Andros–Tinos–Mykonos | Co-Cathedral of Our Lady of the Rosary Mikonos (Μύκονος), Southern Aegean (Νότιο Αιγαίο), Greece |  Co-Cathedral |
| Naxos–Andros–Tinos–Mykonos | Co-Cathedral of St. Andrew Andros (Άνδρος), Southern Aegean (Νότιο Αιγαίο), Greece | Co-Cathedral |
| Naxos–Andros–Tinos–Mykonos | Co-Cathedral of the Presentation of the Lord Naxos (Νάξος), Southern Aegean (Νότιο Αιγαίο), Greece | Co-Cathedral |
| Rhodes | Cathedral of St. Francis of Assisi Rhodes (Ρόδος), Southern Aegean (Νότιο Αιγαίο), Greece | Cathedral |
| Rhodes | Former Cathedral of St. John Rhodes (Ρόδος), Southern Aegean (Νότιο Αιγαίο), Greece |  Former Cathedral |
| Rhodes | Former Cathedral of St. Mary in Castello Rhodes (Ρόδος), Southern Aegean (Νότιο Αιγαίο), Greece |  Former Cathedral |
| Santorini | Cathedral of St. John the Baptist Fira (Φηρά), Southern Aegean (Νότιο Αιγαίο), Greece | Cathedral |
| Syros | Cathedral of St. George Ano Syros (Άνω Σύρος), Southern Aegean (Νότιο Αιγαίο), Greece | Cathedral |
| Thessaloniki | Cathedral of the Immaculate Conception Thessaloniki (Θεσσαλονίκη), Central Macedonia (Κεντρική Μακεδονία), Greece | Cathedral |
