Santurtzi is a municipality in Spain, in the province of Biscay, in the Basque Country. On 1 January 2025 it had 46,442 inhabitants according to the INE municipal register (padrón), over an area of about 9.4 km².
With about 4,941 inhabitants per km², it is one of the most densely populated areas in the country, part of a large metropolitan area. Of the 35 municipalities in the province of Biscay with at least 5,000 inhabitants, it is number 4 by population.
As the crow flies it lies about 13 km north-west of Bilbao, the provincial capital.
Nearby, within a few dozen kilometres, are other destinations featured in our guides: Erasmus in Bilbao (11 km), Guggenheim (12 km), Bilbao (12 km), Castro Urdiales (15 km).
Below you will find a map of neighbouring municipalities, the weather, places to stay in the area and a link to all the municipalities in the province of Biscay.