Coucoucache (French pronunciation: [kukukaʃ]; officially designated as Coucoucache 24A) was a tiny First Nation reserve, in Cloutier Township, on the north shore of Reservoir Blanc on the Saint-Maurice River in the Mauricie region of Quebec, Canada.

It was also the name of the former Coucoucache Lake, where the Hudson's Bay Company had maintained a trading post, called Coocoocache, since at least 1823 (closed circa 1913).

[5] In 1851, the Government enacted the allotment of 230,000 acres (930 km2) of land as reserves for the use and benefit of the "Indian" tribes residing in Lower Canada.

[6] In 1932, the Rapide-Blanc Dam was constructed, leading to the formation of the Reservoir Blanc that inundated Coucoucache Lake and Reserve.

For the loss of land, the Shawinigan Water & Power Company paid the Canadian government the amount of $380.