Ribadesella (Asturian: Ribeseya) is a small (84 km2) municipality in the Autonomous Community of the Principality of Asturias, Spain. Known for its location on the Cantabrian Sea, as well as for the outlet of the River Sella, Ribadesella is a town that forms part of the Picos de Europa (Peaks of Europe). It is bordered on the east by Llanes, on the south by Cangas de Onís and Parres, and on the west by Caravia. Ribadesella is hometown to Queen Letizia of Spain.

The first weekend of August, the Descenso Internacional del Sella (International Descent of the Sella) takes place, where kayakers from all over the world gather to attempt the final 20 km of the Sella River in record time. This town is also known for its prehistoric cave, known as the cave of Tito Bustillo, which is open to visitors year round. Ribadesella is also visited for its history, sport activities, scenery, nature, and food.