| No. | Autonomous system | Served islands | Served population | No. | Autonomous system | Served islands | Served population |
| 1 | Agios Efstratios | Agios Efstratios | 270 | 19 | Megisti | Megisti | 492 |
| 2 | Agathonissi | Agathonissi | 185 | 20 | Milos | Milos | 5887 |
| 3 | Amorgos | Amorgos | 1973 | Kimolos | |||
| 4 | Anafi | Anafi | 271 | 21 | Mykonos | Mykonos | 10,134 |
| 5 | Antikythira | Antikythira | 68 | Delos | |||
| 6 | Arki | Arki | 49 | Rinia | |||
| Marathi | 22 | Othoni | Othoni | 392 | |||
| 7 | Astypalea | Astypalea | 1334 | 23 | Paros | Paros | 36,725 |
| 8 | Gavdos | Gavdos | 152 | Naxos | |||
| 9 | Donoussa | Donoussa | 167 | Antiparos | |||
| 10 | Erikoussa | Erikoussa | 496 | Koufonissi | |||
| 11 | Thira | Thira | 15,550 | Shinoussa | |||
| Thirasia | Iraklia | ||||||
| 12 | Ikaria | Ikaria | 8423 | Sikinos | |||
| 13 | Karpathos | Karpathos | 7310 | Folegandros | |||
| Kassos | Ios | ||||||
| 14 | Crete | Crete | 622,913 | 24 | Patmos | Patmos | 3047 |
| 15 | Kythnos | Kythnos | 1456 | 25 | Rhodes | Rhodes | 115,968 |
| 16 | Kos-Kalymnos | Kalymnos | 59,477 | Chalki | |||
| Lipsi | 26 | Samos | Samos | 34,436 | |||
| Leros | Fourni | ||||||
| Telendos | Thymena | ||||||
| Kos | 27 | Serifos | Serifos | 1420 | |||
| Pserimos | 28 | Sifnos | Sifnos | 2625 | |||
| Giali | 29 | Skyros | Skyros | 2994 | |||
| Nisiros | 30 | Symi | Symi | 2590 | |||
| Tilos | 31 | Syros | Syros | 21,507 | |||
| 17 | Lesvos | Lesvos | 86,436 | 32 | Chios | Chios | 52,674 |
| Megalonisi | Inousses | ||||||
| 18 | Lemnos | Lemnos | 16,992 | Psara |