Lacolle (French pronunciation: [lakɔl]) is a municipality in southern Quebec, Canada, located in the administrative area of the Montérégie, on the Canada–United States border.

The written history of Lacolle can be traced back to July 4, 1609, when Samuel de Champlain and his entourage stopped briefly at the mouth of a small stream for a meal before continuing southward up the Richelieu River into the lake which now bears his name.

The Battle of Lacolle Mills (1812) was a short engagement in which a small garrison of Canadien Militia, with the assistance of Kahnawake Mohawk warriors, defended a makeshift log blockhouse from an American invasion force led by Major General Henry Dearborn.

[6] In the Battle of Lacolle Mills (1814) a garrison of 80 men of the 13th Regiment of Foot and a Congreve rocket detachment of the Royal Marine Artillery, later reinforced by a company of the Canadian Voltigeurs and the Grenadier company of the Canadian Fencibles successfully defended a blockhouse and stone mill building from an attacking American force of 4,000 men led by Major General James Wilkinson.

[10][11] Lacolle as a small industrial park featuring Arneg Inc, Soudure HMC inc, and a Recycling complex operated by Compo Haut-Richelieu inc. (headquartered in St-Jean-sur-Richelieu).