The municipality of Ondarroa lies in the province of Biscay, in the Basque Country: according to official INE figures for 1 January 2025 it is home to 8,060 people, over about 4.8 km².
With about 1,679 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 25 by population.
As the crow flies it lies about 41 km east of Bilbao, the provincial capital. The nearest major city is Bilbao, about 40 km away.
Nearby, within a few dozen kilometres, are other destinations featured in our guides: Pintxos and food (36 km), San Sebastián (37 km), Film festival (37 km), Guggenheim (41 km), Bilbao (41 km).
To explore the area, use the map of neighbouring municipalities and the accommodation options in and around Ondarroa; all the municipalities in the province of Biscay are listed on their own page.