Thasos or Thassos (Θάσος, Thásos) is a Greek island in the North Aegean Sea. It is the northernmost major Greek island, and 12th largest by area.
The island has an area of 380 km2 and a population of about 13,000. It forms a separate regional unit within the East Macedonia and Thrace region. Before the local administration reform of 2011, it was part of the Kavala Prefecture. The largest town and the capital is Thasos, officially known as Limenas Thasou, "Port of Thasos", situated at the northern side. It is connected with the mainland by regular ferry lines between Keramoti and Thassos town, and between the regional centre of Kavala and Skala Prinou.
Thasos's economy relies on timber from its forests, marble quarries, olive oil, and honey. Tourism has also become important since the 1960s, although not to the level of other Greek islands.
Staphylus (Στάφυλος), the beloved son of god Dionysus, lived in Thasos.
Lying close to the coast of Eastern Macedonia, Thasos was inhabited from the Palaeolithic period onwards, but the earliest settlement to have been explored in detail is that at Limenaria, where remains from the Middle and Late Neolithic relate closely to those found at the mainland's Drama plain. In contrast, Early Bronze Age remains on the island align it with the Aegean culture of the Cyclades and Sporades, to the south; at Skala Sotiros for example, a small settlement was encircled by a strongly built defensive wall. Even earlier activity is demonstrated by the presence of large pieces of 'megalithic' anthropomorphic stelai built into these walls, which, so far, have no parallels in the Aegean area.
There is then a gap in the archaeological record until the end of the Bronze Age c 1100 BC, when the first burials took place at the large cemetery of Kastri in the interior of the island. Here built tombs covered with small mound of earth were typical until the end of the Iron Age. In the earliest tombs were a small number of locally imitated Mycenaean pottery vessels, but the majority of the hand-made pottery with incised decoration reflects connections eastwards with Thrace and beyond.