Onís is a municipality in the autonomous community of Asturias, Spain. As of 2023, the population of the municipality equaled 746. Onís is bordered on the north by Llanes, on the south by the province of León, to the east by Cabrales and to the west by Cangas de Onís. The area of the municipality is 75 km2, with more than a third of its territory falling within Picos de Europa National Park. the Pico de Verdilluenga, one of the peaks of the Picos de Europa, is the highest point in the municipality, standing at 2,129 m. The municipality comprises three parishes: Onís, which contains the settlements of Benia (the municipal capital), Avín, El Castru, Los Menores, Pandellavandes, Silviella, Talaveru, and Villar; Bobia, which contains the settlements of Bobia de Abajo (Bovia Baxu), Bobia de Arriba (Bovia Riba), Demués, and Gamonéu; and La Robellada, which contains the settlements of La Robellada and El Pedroso (Pedrosu).