Plessisville, Quebec is a county seat of L'Érable Regional County Municipality, Quebec, Canada. Routes 116 and 165 go through it. The city is 185 km from Montreal and 95 km from Quebec City. The city has hosted an annual Maple festival since 1958, and the Institut québécois de l'érable is headquartered there. The production of maple syrup and maple products is a major industry in the entire area, even giving the regional county municipality its name.