The municipality of Castellar del Vallès lies in the province of Barcelona, in Catalonia: according to official INE figures for 1 January 2025 it is home to 25,422 people, over about 46.8 km².
Density, at about 543 inhabitants per km², is that of a populous urban area, with residential districts, services and businesses. Of the 134 municipalities in the province of Barcelona with at least 5,000 inhabitants, it is number 40 by population.
As the crow flies it lies about 26 km north of Barcelona, the provincial capital. The nearest major city is Barcelona, about 25 km away.
Nearby, within a few dozen kilometres, are other destinations featured in our guides: Terrassa (9 km), Sabadell (9 km), Lifestyle (25 km), 10 things to see (26 km), Festivals and events (27 km).
To explore the area, use the map of neighbouring municipalities and the accommodation options in and around Castellar del Vallès; all the municipalities in the province of Barcelona are listed on their own page.