Its history dates to 1674, when a group of Huron (Wyandot) fleeing war with the Iroquois settled there under the protection of the French.

The Jesuit missionary Pierre Chaumonot in 1674 founded a settlement here when he built a chapel for the Huron (Wyandot).

In gratitude, he placed the colony under the patronage of Our Lady of the Annunciation, but it is still commonly called Lorette.

In 1967, it gained town status and took back its original name, L'Ancienne-Lorette, to distinguish itself from the Notre-Dame-de-Lorette Lac-Saint-Jean region.

[4] According to the Canada 2021 Census:[5] Population trend:[6] In 2021, L'Ancienne-Lorette was 94.3% White, 1.6% Black, 1.2% Latin American and 1% Arab.