Notre-Dame-du-Lac (French pronunciation: [nɔtʁə dam dy lak]) is a former city in the regional county municipality of Témiscouata in the province of Quebec, Canada, located in the administrative region du Bas-Saint-Laurent.

Until its joining with Cabano, Notre-Dame-du-Lac was the chef-lieu de la regional county municipality and the hospital, ferry, and police station of Témiscouata were located there.

The name "Détour-du-Lac" was given because of its geographic situation, which made the place an excellent one to come alongside it and sink into the earth.

On December 2, 1969, Notre-Dame-du-Lac suffered its worst disaster in history when at least 51 people were killed in an early morning fire at Repos du Viellard, a home for the elderly Only 22 people survived the blaze, including the rest home's owner, wife, and children [2] On 21 June 2009, the motion to merge Notre-Dame-du-Lac with the neighbouring city of Cabano was adopted by 70% by referendum.

Notre-Dame-du-Lac was recently named "Garden City" and has a flower emblem called "The Lady of the Lake," a variety of daylily specially designed for the occasion.