L'Ascension-de-Notre-Seigneur (French pronunciation: [lasɑ̃sjɔ̃ də nɔtʁ sɛɲœʁ]) is a parish municipality in Quebec, Canada, located within the regional county municipality of Lac-Saint-Jean-Est in the Saguenay-Lac-Saint-Jean region.

The municipality had a population of 2,079 in the Canada 2021 Census.

The area opened for colonization in 1896 and on June 8, 1916, the parish was formed.

In 1919, the place was incorporated, taking the name of the parish.

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