Samson is the largest uninhabited island of the Isles of Scilly, off the southwestern tip of the Cornish peninsula of Great Britain. It is 38 hectares (0.15 sq mi) in size. The island consists of two hills, North Hill and South Hill, which are connected by an isthmus. Samson was named after Samson of Dol.

Samson of Dol was a Welsh saint, who is also counted among the seven founder saints of Brittany with Pol Aurelian, Tugdual or Tudwal, Brieuc, Malo, Patern (Paternus) and Corentin. Born in southern Wales, he died in Dol-de-Bretagne, a small town in north Brittany.