The Principality of Asturias is an autonomous community within the kingdom of Spain, former Kingdom of Asturias in the Middle Ages. It is situated on the Spanish north coast facing the Cantabrian Sea (Mar Cantábrico, the Spanish name for the Bay of Biscay).

The most important cities are the provincial capital, Oviedo, the seaport and largest city Gijón, and the industrial town of Avilés. Other towns include Mieres, Langreo (with La Felguera and Sama), Pola de Siero, Luarca, Cangas de Onís, Cangas del Narcea, Grado, Lena, Laviana, El Entrego, Villaviciosa, Vegadeo, and Llanes. See also List of municipalities in Asturias, Comarcas of Asturias.

Asturias is bordered on the east by Cantabria, on the south by Castilla y León, on the west by Galicia (Lugo), and on the north by the Cantabrian Sea.