Cudillero is a municipality in the Principality of Asturias, Spain. Nowadays, Cudillero's main economic activities are related to tourism, but it is also known for its fishing industry. A legend says that it was founded by the Vikings. In addition to Castillian some locals still speak a dialect called Pixueto.

Usually, Spanish-media considers Cudillero as one of the most beautiful villages in Spain.

The Way of Saint James, named The Northern Way (Camino de la Costa) passes through Cudillero. There is also a Pilgrim Heritage Hostal: Albergue de Peregrinos "Soto de Luiña" - Soto de Luiña, s/n - 3156-Cudillero with 20 Beds.