The Lac Sept Îles (sometimes spelled Lac aux Sept-Isles[1]) (English: Seven Islands Lake) is a body of water located in the township of Gosford, in the municipality of Saint-Raymond, in the Portneuf Regional County Municipality, in the administrative region of Capitale-Nationale, in Quebec, in Canada.

Thanks to its forest and mountain environment, its islands and bays, its proximity to Quebec city, and the Duchesnay tourist resort, the area around the lake is highly developed.

The Lake Sept Îles is located 6 km (3.7 mi) northeast of the village center of Saint-Raymond, in Portneuf Regional County Municipality; 2.3 km (1.4 mi) from Sergent Lake (located to the south) and 2.2 km (1.4 mi) from Saint-Joseph Lake (La Jacques-Cartier) (located to the south-east).

Colonization around the lake began around 1857–1858; eleven families were listed there in 1861, while the population of Saint-Raymond was then 2,902 inhabitants.

[2] The toponym “Lac Sept Îles” was formalized on December 5, 1968, at the Bank of Place Names of the Commission de toponymie du Québec.