Gijón is a city in north-western Spain. It is the largest city and municipality by population in the autonomous community of Asturias. It is located on the coast of the Cantabrian Sea in the Bay of Biscay, in the central-northern part of Asturias; it is approximately 24 km (15 mi) north-east of Oviedo, the capital of Asturias, and 26 km from Avilés. With a population of 271,780, Gijón is the 15th largest city in Spain.

Gijón forms part of a large metropolitan area that includes twenty councils in the center of the region, structured with a dense network of roads, highways and railways and with a population of 835,053 inhabitants in 2011, making it the seventh largest in Spain.

During the 20th century, Gijón developed as an industrial city in the steel and naval industries. However, due to the decline in manufacturing in these industries, in recent years Gijón is undergoing a transformation into an important tourist, university, commercial and R&D center. Gijón is the location of the Radiotelevisión del Principado de Asturias, the neighbourhood of Cimavilla, the Universidad Laboral de Gijón, the Revillagigedo Palace, and the adjoining Collegiate Church of San Juan Bautista.

The city is situated on the coast of central Asturias, from sea level to an altitude of 513 metres at Picu Samartín and 672 metres at Peña de los Cuatro Jueces, bordered on the West by Carreño, the East by Villaviciosa, and to the South by Siero and Llanera

The city is situated along the Asturian coast and is distinguished by the peninsula of Cimavilla (the original settlement) which separates the beach of San Lorenzo and adjacent neighborhoods to the east from the beaches of Poniente and Arbeyal, the shipyards, and the recreational port and the Port of El Musel to the west. It is close to the other main Asturian cities, Oviedo and Avilés.