The municipality of Piélagos lies in the province of Cantabria, in Cantabria: according to official INE figures for 1 January 2025 it is home to 26,901 people, over about 85.0 km².
Density, at about 316 inhabitants per km², is that of a populous urban area, with residential districts, services and businesses. Of the 22 municipalities in the province of Cantabria with at least 5,000 inhabitants, it is number 5 by population.
As the crow flies it lies about 12 km south-west of Santander, the provincial capital. The nearest major city is Bilbao, about 85 km away.
Nearby, within a few dozen kilometres, are other destinations featured in our guides: Santander (14 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 Cantabria.