The City of Sarnia is located in the southwestern region of the Province of Ontario, on the Canada-U.S. international border. The City is bordered by Lake Huron to the north and by the St. Clair River to the west. Sarnia also surrounds the Village of Point Edward, a small waterfront community with a population of 2,257.

Sarnia is one of 11 municipalities within Lambton County and is the largest municipality in terms of population. The County is primarily rural, with large areas of high-quality agricultural land, smaller towns, villages and lakeshore communities. Grand Bend, on the Lake Huron shoreline, is a popular destination for summer visitors.

Sarnia is conveniently and strategically located about an hour’s drive west of London, Ontario, and about an hour northeast of Detroit, Michigan. The twinned span of the Blue Water International Bridge, constructed between Point Edward and Port Huron, Michigan, is a vital transportation link between Ontario’s highway system and the State of Michigan. Sarnia is connected eastward to key markets in the Great Lakes Industrial Corridor via Highway 402 and other 400 series highways. Westward, Highway 402 connects directly to the NAFTA superhighway into Mexico via Michigan’s Interstate 94/69/75 network and the Blue Water Bridge.