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 conveniently and strategically located about an hourís 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 Ontarioís 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 Michiganís Interstate 94/69/75 network and the Bluewater Bridge.