The Township of Lambton was declared a municipality on April 22, 1847. Alexis Poulin, a resident of Beauceville, discovered the picturesque site in 1837 while hunting. Poulin traveled all the way to Lake St-François, marking his route along the way. At the end of the 1830s, British colonists, drawn by nearby lakes St-François and Lambton, established the municipality there. These founders named it in honour of an English Earl, John George Lambton, Lord of Durham and Governor General of Canada in 1838. The English and French-Canadian colonists lived side-by-side, until the English realized the land was not as profitable as they had hoped, after which the area became predominantly Francophone. Its first church, built in 1873-74, was destroyed by fire on August 22, 1905 – a fire that also claimed the rectory, convent and 32 homes in the village. The current church, built in 1905-07 with the grandeur of a cathedral, and the rectory sit proudly in the centre of the village. Both buildings have been declared heritage sites by the municipality. Lambton's prosperity springs from agriculture, raw materials and processing, and tourism.
