La Vall de Bianya (Catalan pronunciation: [lə ˈβaʎ ðə βiˈaɲə]) is a municipality of the comarca of Garrotxa, Catalonia.

The seat of the municipal government is in L'Hostalnou de Bianya, and the village with more inhabitants is La Canya.

This latter village is divided between the municipalities of La Vall de Bianya and Sant Joan les Fonts.

The municipal area also contains the Bac valley, located at the headwaters of the Oix and Castellar de la Muntanya streams.

La Canya enclave borders to the east with the Aiguanegra range, to the west with the Sant Valentí range, to the north with the part of La Canya that belongs to Sant Joan les Fonts, and to the south with the part of this village that belongs to Olot.

La Vall de Bianya is the second municipality of Garrotxa with the largest area, after Montagut i Oix.

The territory which nowadays forms the municipality of La Vall de Bianya was part of the County of Besalú.

The parishes were the origin of the vast majority of the villages that form the actual municipality of La Vall de Bianya.

The new Spanish Constitution of 1869 caused another administrative reform in 1870 [13] which provoked the fusion of six municipalities to Capsec in 1875: Castellar de la Muntanya, Socarrats, Sant Martí del Clot, Sant Pere Despuig, Santa Margarida de Bianya and La Vall del Bac.

In December 1909 and July 1911 the citizens of Capsec demanded the municipality to be called Vall de Bianya again.

[14] During the Spanish Civil War a lot of churches from the old municipalities of La Vall de Bianya (Capsec) and Sant Salvador were burned.

During the 1950s, there was a gradual economic recovery which allowed building several bridges which improved the communications between the different villages and isolated country houses of La Vall de Bianya.

To stop the emigration of inhabitants to other municipalities, in 1984 and 1985 the urbanizations of L'Hostalnou de Bianya and Llocalou started to be built, respectively.

The building of these tunnels allowed the discovery of a natural spring, and in 1996 a project divided in different phases started to take advantage of this water.