Alt Àneu (Catalan pronunciation: [ˈalt ˈanew]) 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 1,913.79 square kilometres (738.92 sq mi), with a population of 453 (register office, 2025) . 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.
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Subdivisions
The municipality of Alt Àneu is formed by nine villages. Populations are given as of 2005:
Alòs d'Isil (34)
Àrreu (6)
La Bonaigua (16)
Borén (25), on the left bank of the Noguera Pallaresa
Isavarre (25)
Isil (85), in the upper valley
Son (46)
Sorpe (42)
València d'Àneu (175), on the right bank of the Noguera Pallaresa
Demography
It has a population of 453 (register office, 2025) .