Lac-Fouillac () is a former unorganized territory in the Abitibi-Témiscamingue region of Quebec, Canada, now part the Municipality of Rivière-Héva in the La Vallée-de-l'Or Regional County Municipality.
In July 2007, the residents of Lac-Fouillac overwhelmingly rejected the amalgamation of their territory with the City of Malartic. 96% of voters voted against annexation in a referendum. But two years later on August 29, 2009, Lac-Fouillac, together with the western portion of the Unorganized Territory of Lac-Granet, was merged into the Municipality of Rivière-Héva.Institut de la statistique du Québec, Modifications aux municipalités du Québec Août 2009, Québec, ISSN 0843-8250
Demographics Population:Statistics Canada: 1996, 2001, 2006 census Population in 2006: 91 Population in 2001: 77 Population in 1996: 174 Population in 1991: 168
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