Sesklo (Greek: Σέσκλο) is a village near the city of Volos, in Thessaly (central Greece), in the regional unit of Magnesia. It is part of the municipal unit Aisonia. Nearby, a Neolithic settlement was discovered at the end of the 19th century and the first excavations were made by Greek archaeologist, Christos Tsountas.
The Neolithic settlement was covering an area of about 20 hectares in its peak period around 5000 BC and comprised about 500 - 800 houses with a population of perhaps up to 5,000 people.
This settlement gives its name to the first Neolithic culture of Europe, which inhabited Thessaly and parts of Macedonia (Greece). The oldest fragments researched at Sesklo place the civilization's development as far back as 6850 BC with a +/- 660 year margin of error, known as proto-Sesklo (main group) and pre-Sesklo (secondary groups with differentiated characteristics) and they show an advanced agriculture and a very early use of pottery that rivals in age those of the Near East.