L'Isle-Verte is a small municipality located along the south shore of the Saint Lawrence River, in the Rivière-du-Loup Regional County Municipality of the Bas-Saint-Laurent region, Quebec, Canada. The name of the village refers to Île Verte, a nearby island that is not within its municipal boundaries. Village and island are joined by a seasonal ferry.

Area codes 418, 581, and 367 are telephone area codes in the North American Numbering Plan (NANP) for the eastern portion of the Canadian province of Quebec. Area code 418 was originally assigned to the numbering plan area, but all three area codes now form an overlay plan for this territory. Cities in the numbering plan area include Quebec City, Saguenay, Lévis, Rimouski, Saint-Georges, Alma, Thetford Mines, Sept-Îles, Baie-Comeau and Rivière-du-Loup. Also served are the Gaspé Peninsula, Côte-Nord, southeastern Mauricie, and the tiny hamlet of Estcourt Station, in the U.S. state of Maine.