Saint-Jean-sur-Richelieu is a city in eastern Montérégie in the Canadian province of Quebec, about 40 kilometres (25 mi) southeast of Montreal, located roughly halfway between Montreal and the Canada–United States border with the state of Vermont. It is situated on both the west and east banks of the Richelieu River at the northernmost navigable point of Lake Champlain. As of December 2019, the population of Saint-Jean-sur-Richelieu was 98,036.

Autoroute 35 (A-35) is an Autoroute in the region of Montérégie, Quebec, Canada. With the first section constructed in the 1960s, the A-35 links Saint-Jean-sur-Richelieu with Montreal via the A-10. The A-35 is also the primary route for traffic between Montreal and Boston, although it ends 13.4 km (8.3 mi) short of the U.S. border. South of its current terminus in Saint-Sébastien, the A-35 continues as two-lane Route 133 to the border. An extension of A-35 to meet Interstate 89 at Saint-Armand will complete a nearly 500 km (310 mi) limited-access highway link between Montreal and Boston. It had been scheduled to open in 2017, but was delayed until 2023, and then delayed again until 2026.