Sarnia—Lambton

Sarnia—Lambton hugs the southeastern shore of Lake Huron at the point where the St. Clair River marks the Canada–United States border with Michigan. The riding takes in the city of Sarnia, the historic oil towns of Petrolia and Oil Springs, and the agricultural townships of Lambton County, including Enniskillen, Dawn-Euphemia, Brooke-Alvinston, and Plympton-Wyoming. The Aamjiwnaang First Nation and the community of Point Edward round out a constituency whose character is defined by the dense cluster of petrochemical refineries and chemical plants known as Chemical Valley.

Candidates

Marilyn Gladu (Conservative) — A professional engineer from St. Catharines who studied engineering and chemistry at Queen's University, Gladu spent twenty-one years at Dow Chemical in Sarnia before becoming director of engineering at Suncor, where she oversaw the Genesis Project. First elected in 2015, she was recognized by Maclean's as the most collegial parliamentarian and served as the Official Opposition's science critic during the previous Parliament.

Adam Kilner (NDP) — A minister of the United Church of Canada serving at Dunlop United Church in Sarnia, Kilner held a Master of Divinity degree from the University of Toronto and was active in local community organizations including Big Brothers and the Seaway Kiwanis Club. He campaigned on economic diversification through green energy investment.

Carmen Lemieux (Liberal) — A retired educator who spent the early part of her career as a senior communications specialist at Dow Chemical, Lemieux transitioned to teaching in 1992 and worked in French immersion schools across Lambton County. She became principal of Errol Road School and Hanna Memorial, and later served as the first principal of Lambton-Kent's only single-track French immersion school before retiring in 2017.

Peter Robert Smith (Green Party) — A retired energy industry consultant with a degree in nuclear engineering, Smith worked seventeen years at Polysar and another decade at TransAlta before settling in Sarnia. He had previously carried the Green Party banner in the 2015 federal election and won the local party's first-ever contested nomination in 2019.

Brian Everaert ran for the People's Party of Canada, and Thomas Laird stood for the Christian Heritage Party.

About the Riding

Chemical Valley—a corridor of more than sixty refineries and petrochemical plants lining the St. Clair River—has been the economic engine of Sarnia—Lambton for generations. NOVA Chemicals, Imperial Oil, Suncor, and Shell all operate major facilities in the area, and the sector supports thousands of direct and indirect jobs. The riding also holds a pioneering place in Canadian industrial history: the discovery of oil near Oil Springs in 1858 launched North America's first commercial oil well, one year before the more famous Pennsylvania strike.

Outside the Sarnia urban core, Lambton County's flat, fertile farmland supports cash crops, livestock, and specialty agriculture. The Lake Huron shoreline draws seasonal tourism to communities like Grand Bend and Lambton Shores. Environmental and health concerns have been a persistent feature of the riding's public life, particularly around the Aamjiwnaang First Nation, which is bordered on three sides by Chemical Valley and has long raised concerns about air quality and industrial emissions. Balancing the petrochemical sector's economic contribution with environmental stewardship remained one of the riding's central tensions heading into the 2019 campaign.