Skiathos has its roots in the pre-Hellenic period, with the island's first inhabitants, the Pelasgians, reportedly naming it due to the significant shade ("skia" in Greek) provided by its abundant trees.
Following the Pelasgians, the island saw settlement by Cretans and Mycenaeans, who also populated the rest of the Sporades.
Skiathos's rich fertility and strategic location made it a target for various invaders. In the 7th and 6th centuries BC, the citizens of Chalkis from Evia Island colonized Skiathos, establishing its first fortified town.
During the Persian Wars, Skiathos played a crucial role by serving as a fleet base for the Athenians, highlighting its importance in ancient maritime strategy.
The island's historical significance and its ability to attract diverse cultures reflect its enduring legacy through the centuries.