Map of Sarnia

About Sarnia

Sarnia is a city in Southwestern Ontario located on the St. Clair River at the U.S. border, with a population of approximately 72,000 residents. Known as 'Chemical Valley' due to its large petrochemical industry, Sarnia is home to major refineries and chemical plants that form the backbone of the local economy. The city's location on the St. Clair River and at the base of Lake Huron makes it an important shipping and border crossing point.

Sarnia's economy is dominated by the petrochemical industry, with multiple major facilities along the riverfront. Beyond industry, the city offers a beautiful waterfront with parks, trails, and beaches along the St. Clair River and Lake Huron. The Bluewater Bridge connects Sarnia to Port Huron, Michigan, serving as one of the busiest Canada-U.S. border crossings. Downtown Sarnia features historic buildings, shops, restaurants, and cultural venues including the Imperial Theatre. The city serves as a regional center for Lambton County.

Highway 402 provides main access to Sarnia, connecting east to Highway 401 and London (approximately 100 km). Highway 40 runs north-south through the city. The Bluewater Bridge carries Highway 402 across the St. Clair River to Michigan. Christina Street and London Road serve as major commercial corridors. The St. Clair River forms the western boundary, separating Canada from the United States, while Lake Huron lies to the north. Sarnia's port facilities handle significant cargo shipping, and the city is an important link in the Great Lakes-St. Lawrence Seaway system.