In Greece there are 6,000 islands, islets and islets. Of all these islands only 117 are inhabited. Of these, only 79 have a population of over 100 inhabitants and only 53 over 1,000.
Most Greek islands are located in the Aegean Sea, fewer in the Ionian and a few in the Libyan.
Crete, the largest of the Greek islands, along with a number of islands located near its shores, the most important of which are Gavdos, Zeus, Chrysi, Koufonisi and Spinalonga.
Evia, the second largest Greek island, along with a number of islands located near its shores, the most important of which is the Megalonisos of Petalia.
Cyclades, with the most important islands Syros, Naxos, Thira (Santorini), Paros, Andros, Mykonos, Tinos, Milos, Sifnos, Kea (Tzia), Ios, Amorgos, Kythnos, Serifos, Antiparos, Kimolos, Folegandros, Koufonisia, Anafi, Sikinos, Schinoussa, Donoussa, Heraklion, Thirasia, Delos, Makronisos, Gyaros, Polyaigos, Keros and Rine .
Dodecanese, with the most important islands Rhodes, Kos, Kalymnos, Leros, Karpathos, Patmos, Symi, Astypalea, Kasos, Nisyros, Lipsi, Tilos, Kastelorizo, Halki, Agathonisi, Pserimos, Farmakonisi, Telendos, Arkios, Levitha, Giali, Kalolimnos, Saria, Kinaro, Syrna, Alimia and Nimos.
Ionian Islands or Ionian Islands, with the most important islands being Corfu, Zakynthos, Kefalonia, Lefkada, Kythira, Ithaca, Paxos, Meganisi, Ereikoussa, Kalamos, Othonos, Mathraki, Kastos, Strofades, Antikythera, Antipaxos, Atoko, Arkoudi, Petalas and Oxia.
Northeast Aegean islands, the most important of which are Lesvos, Chios, Samos, Lemnos, Thassos, Ikaria, Samothrace, Fourni, Oinousses, Psara, Agios Efstratios, Thymaina and Antipsara.
Sporades, with the most important islands Skiathos, Skopelos, Skyros, Alonissos, Giura, Kyra Panagia, Peristera, Skantzoura, Piperi and Skyropoula.
Argosaronikos islands, the most important of which are Salamina, Aegina, Poros, Spetses, Hydra, Agistri and Dokos.
There is also a plethora of islands that are not part of a complex and are located very close to the mainland coasts, the most important of which are Elafonisos at the southeastern tip of the Peloponnese, Ammouliani in the gulf of Mount Athos, Paleo Trikeri in the Pagasitikos and the Trizonia of Fokida in the Corinthian gulf.
A special case are the islands of inland waters (lakes, natural or artificial, rivers, reservoirs) with the most important being the Island of Ioannina in Lake Pamvotida and Agios Achilleios in Lake Mikri Prespa, while many more islands exist in the estuaries and river deltas. lagoons, most importantly Tourlida in the lagoon of Messolonghi.