Sarnia Lambton Commercial 2005

 Sarnia—Lambton (formerly known as Sarnia) is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 1968. It is located in the area of the city of Sarnia, in the southwest corner of the province of Ontario.

Until 2015, Sarnia—Lambton, with its predecessors Sarnia, and Lambton West, was Canada's most bellwetherly riding, having voted for the winning party from 1963 to 2011