Santutxu is one of the most populous neighbourhoods of Bilbao

Bilbao

Bilbao ) is a Spanish municipality, capital of the province of Biscay, in the autonomous community of the Basque Country. With a population of 353,187 , it is the largest city of its autonomous community and the tenth largest in Spain...

 (Basque Country

Basque Country (autonomous community)

The Basque Country is an autonomous community of northern Spain. It includes the Basque provinces of Álava, Biscay and Gipuzkoa, also called Historical Territories....

). It belongs to the 4th urban district, named Begoña

Begoña

Begoña or more puristically but also more rarely spelled Begoina, meaning "the lower foot" , is a historical municipality of Biscay that was incorporated to Bilbao in 1925....

. It is basically a popular residential neighbourhood but has also a relatively strong commercial area, including a food retail market of its own.

Santutxu is the most densely populated neighbourhood of Bilbao and Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

, at 41,430 hab/km². http://www.bilbao.net/castella/relaciones_ciudadanas/publicaciones/bilbao_en_cifras/2006/territorio_climatologia.pdf

There are two underground stations (Metro Bilbao

Metro Bilbao

Metro Bilbao is a rapid transit system serving the city of Bilbao and the region of Greater Bilbao. Its lines have a "Y" shape, with two lines that transit both banks of the Nervión river and then combine to form one line that ends in the south of Bilbao...

) in Santutxu, called 'Santutxu' (in Karmelo St. & Zabalbide St.) and 'Basarrate' (in Basarrateko Landa).