Aller, in Asturias, is part of the province of Asturias. The municipality covers about 374.3 km² and had 10,011 inhabitants on 1 January 2025.
Population density is about 27 per km²: a partly rural municipality, with a main town and scattered villages or developments. Of the 29 municipalities in the province of Asturias with at least 5,000 inhabitants, it is number 19 by population.
As the crow flies it lies about 35 km south-east of Oviedo, the provincial capital. The nearest major city is Bilbao, about 215 km away.
Nearby, within a few dozen kilometres, are other destinations featured in our guides: Oviedo (35 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 Asturias.