Vathy (Greek: Βαθύ, Vathý) is a town and a former municipality on the island of Samos, North Aegean, Greece. Since the 2011 local government reform it is part of the municipality Samos, of which it is a municipal unit. It is the capital and main town of the island. The municipal unit comprises numerous towns, villages, and settlements, but its two largest are Samos (town) (pop. 6,191 in 2011), and Vathy (pop. 1,888). The town of Samos is the largest on the island, and the heart of its economy based on tourism. Vathy is a sister city of Kuşadası, Turkey since October 28, 1999.