Regional units of Greece in the context of "Lasithi"

The traditional geographic regions of Greece (Greek: γεωγραφικά διαμερίσματα, lit. 'geographic departments') are the country's main historical-geographic regions, and were also official administrative regional subdivisions of Greece until the 1987 administrative reform. Despite their replacement as first-level administrative units by only partly identical administrative regions (Greek: περιφέρειες), the nine traditional geographic regions—six on the mainland and three island groups—are still widely referred to in unofficial contexts and in daily discourse.

As of 2011, the official administrative divisions of Greece consist of 13 regions (Greek: περιφέρειες)—nine on the mainland and four island groups—which are further subdivided into 74 regional units and 325 municipalities. Formerly, there were also 54 prefectures or prefectural-level administrations.

The regions of Greece (Greek: περιφέρειες, romanized: periféreies) are the country's thirteen second-level administrative entities, counting decentralized administrations of Greece as first-level. Regions are divided into regional units, known as prefectures until 2011.

Continental Greece (Greek: Στερεά Ελλάδα, romanized: Stereá Elláda; formerly Χέρσος Ἑλλάς, Chérsos Ellás), colloquially known as Roumeli (Ρούμελη), is a traditional geographic region of Greece. In English, the area is usually called Central Greece, but the equivalent Greek term (Κεντρική Ελλάδα, Kentrikí Elláda) is more rarely used.

It includes the southern part of the Greek mainland (sans the Peloponnese), as well as the offshore island of Euboea. Since 1987, its territory has been divided among the administrative regions of Central Greece and Attica, and the regional unit (former prefecture) of Aetolia-Acarnania in the administrative region of Western Greece.

Thessaloniki (Greek: Μητροπολιτική ενότητα Θεσσαλονίκης Mitropolitiki enotita Thessaloníkis, Metropolitan unit of Thessaloniki) is one of the regional units of Greece. It is part of the Region of Central Macedonia and its capital is the city of Thessaloniki.

Lesbos or Lesvos (Greek: Λέσβος, romanized: Lésvos [ˈlezvos]) is a Greek island located in the northeastern Aegean Sea. It has an area of 1,633 km (631 sq mi), with approximately 400 kilometres (249 miles) of coastline, making it the third largest island in Greece and the eighth largest in the Mediterranean. It is separated from Asia Minor by the narrow Mytilini Strait. On the southeastern coast is the island's capital and largest city, Mytilene (Μυτιλήνη), whose name is also used for the island as a whole. Lesbos is a separate regional unit with the seat in Mytilene, which is also the capital of the larger North Aegean region. The region includes the islands of Lesbos, Chios, Ikaria, Lemnos, and Samos. The total population of the island was 83,755 in 2021. A third of the island's inhabitants live in the capital, while the remainder are concentrated in small towns and villages. The largest are Plomari, Agia Paraskevi, Polichnitos, Agiassos, Eresos, Gera, and Molyvos (the ancient Mythimna).

According to later Greek writers, Mytilene was founded in the 11th century BC by the family Penthilidae, who arrived from Thessaly and ruled the city-state until a popular revolt (590–580 BC) led by Pittacus of Mytilene ended their rule. In fact, the archaeological and linguistic records may indicate a late Iron Age arrival of Greek settlers, although references in Late Bronze Age Hittite archives indicate a likely Greek presence then. According to Homer's Iliad, Lesbos was part of the kingdom of Priam, which ruled from Troy. In the Middle Ages, it was under Byzantine and then Genoese rule. Lesbos was conquered by the Ottoman Empire in 1462. The Ottomans then ruled the island until the First Balkan War in 1912, when it became part of the Kingdom of Greece.

Chalkidiki (/kælˈkɪdɪki/; Greek: Χαλκιδική, romanized: Chalkidikḗ [xalciðiˈci], alternatively Halkidiki), also known as Chalcidice, is a peninsula and regional unit of Greece, part of the region of Central Macedonia, in the geographic region of Macedonia in Northern Greece. The autonomous Mount Athos region constitutes the easternmost part of the peninsula, but not of the regional unit.

The capital of Chalkidiki is the town of Polygyros, located in the centre of the peninsula, while the largest town is Nea Moudania. Chalkidiki is a popular summer tourist destination.

Kefalonia or Cephalonia (Greek: Κεφαλονιά), formerly also known as Kefallinia or Kephallenia (Κεφαλληνία), is the largest of the Ionian Islands in western Greece and the 6th-largest island in Greece after Crete, Euboea, Lesbos, Rhodes and Chios. It is also a separate regional unit of the Ionian Islands region. It was a former Latin Catholic diocese Kefalonia–Zakynthos (Cefalonia–Zante) and short-lived titular see as just Kefalonia. The largest cities of Cephalonia are Argostoli and Lixouri.

Following the implementation on 1 September 2019 of the Kleisthenis I Programme, the administrative divisions of Greece consist of two main levels: the regions and the municipalities. In addition, a number of decentralized administrations overseeing the regions exist as part of the Ministry of the Interior, but are not part of local government. The old prefectures were either abolished and divided or transformed into regional units in 2011 by Kallikratis Plan. The administrative regions are divided into regional units which are further subdivided into municipalities. The Eastern Orthodox monastic community on Mount Athos is an autonomous self-governing entity.