Sant Joan les Fonts (Catalan pronunciation: [ˈsaɲ ʒuˈan ləs ˈfɔns]) is a municipality of the comarca of Garrotxa, located in Girona, Catalonia, northern Spain. As of 2014, the population is 2,919. Until 1949 it was known as Begudà.

It is part of the Zona Volcànica de la Garrotxa Natural Park.

It is the second most populous municipality of Garrotxa (after Olot). It is located at the confluence linking Girona to Olot, Figueres and Camprodón. It is crossed by the river Fluvià, which has been the engine behind the population's industrial development. Industry is the most developed sector in the municipality, followed by agriculture.

The earliest core of the town was formed in the ninth century. Earthquakes in the years 1427 and 1428 most of the collapsed buildings.^{[clarification needed]} A recovery began in the area, with small population centers, that was hampered by civil war in the fifteenth century.

During the 17th century, it lived through an age of crisis, aggravated by the War of the Spanish Succession.

There was no significant population growth until the eighteenth century, with the incorporation of immigrants from Olot and the vicinity. Later, war resulted in another decline of the population, a decline that continued throughout the 19th century. The 1854 cholera epidemic wreaked havoc.

During the 20th century, there was a social and economic revival, despite the internecine 1936 civil war.

Monestir de Sant Joan les Fonts is a Romanesque building, declared a national monument.