Alt Àneu is a town and municipality in Pallars Sobirà county in Catalonia. It was created in 1970 as a result of the union of the former municipalities of Isil, Son, Sorpe, and Valencia d'Àneu, plus the addition of the Commonwealth of the Four Villages. It is the largest municipality in Catalonia in terms of area at 1913.79 sqkm, with a population in 2022 of 441. It is situated by the Noguera Pallaresa river, and is served by the C-13 road, which links it with county capital Sort and to the Aran Valley over the Port de la Bonaigua (2072 m). The ajuntament (town hall) is in València d'Àneu.

Subdivisions

The municipality of Alt Àneu is formed of nine villages. Populations are given as of 2005:

Demography