It was created as Sarnia electoral district in 1966 from parts of
Lambton West riding. It consisted of that part of the County of Lambton contained in the City of Sarnia and the Townships of Moore, Sarnia and Plympton excepting the Town of Forest. In 1970, the name of the electoral district was changed to Sarnia—Lambton. It was abolished in 1976 when it was redistributed between
Lambton—Middlesex and a new Sarnia riding. The new Sarnia riding consisted of that part of the County of Lambton contained in the City of Sarnia, the Townships of Moore and Sarnia, the Village of Point Edward, and Indian Reserve No. 45. The name of this electoral district was changed in 1981 to Sarnia—Lambton again. In 1996, the riding was redefined to include the City of Sarnia and the township of Sombra. The former township of Sarnia was merged with the City of Sarnia on January 1, 1991. In 2003, it was redefined to consist of that part of the County of Lambton comprising the City of Sarnia, the towns of
Petrolia and Plympton-Wyoming, the villages of Oil Springs and Point Edward, the townships of Enniskillen and St. Clair, and Sarnia Indian Reserve No. 45. This riding was left unchanged after the
2012 electoral redistribution. Under the
2022 Canadian federal electoral redistribution the riding was renamed
Sarnia—Lambton—Bkejwanong. Bkejwanong is the Anishinaabemowin name for Walpole Island, the home of the
Walpole Island First Nation, a part of the riding. It is proposed that the riding's name revert to
Sarnia—Lambton as part of
Bill C-25 of the
45th Canadian Parliament.
Members of Parliament ==Election results==