Route 209 is a provincial highway located in the Montérégie region of Quebec south of Montreal.

The route runs from the Canada-United States border in Franklin and ends at the Saint-Constant/Sainte-Catherine limit, south of Montreal at the junction of Route 132.

South of the US border it continues as New York State Route 189 in Clinton, New York.

It also provides the main link to Saint-Rémi, the largest city in the Jardins-de-Napierville MRC.

This Quebec road, road transport or highway-related article is a stub.