Derio is a municipality in Spain, in the province of Biscay, in the Basque Country. On 1 January 2025 it had 7,294 inhabitants according to the INE municipal register (padrón), over an area of about 10.6 km².
Density, at about 688 inhabitants per km², is that of a populous urban area, with residential districts, services and businesses. Of the 35 municipalities in the province of Biscay with at least 5,000 inhabitants, it is number 29 by population.
As the crow flies it lies about 7 km north-east of Bilbao, the provincial capital.
Nearby, within a few dozen kilometres, are other destinations featured in our guides: Guggenheim (6 km), Erasmus in Bilbao (6 km), Bilbao (6 km), Castro Urdiales (28 km).
To explore the area, use the map of neighbouring municipalities and the accommodation options in and around Derio; all the municipalities in the province of Biscay are listed on their own page.