Imperial Oil Limited (French: Compagnie Pétrolière Impériale Limitée) () is Canada's largest petroleum company. The company is engaged in the exploration, production and sale of crude oil and natural gas. It is controlled by ExxonMobil, which owns 69.6% of its stock. Imperial owns 25% of Syncrude Canada Ltd., the world's largest producer of synthetic crude oil from strip mining of oil sands. Imperial Oil operates service stations in Canada under the trade name Esso as well as other brand names. Its owned-and-operated convenience stores use the On the Run / Marché Express or Tiger Express brands.
Imperial is one of Canada's top natural gas producers, the country's major refiner and marketer of petroleum products and an important manufacturer of petrochemicals. Most of Imperial's production is from its vast natural resource holdings in Alberta and the Northwest Territories.
Bruce March is the current Chairman, President and CEO since 2008, replacing Tim Hearn who retired effective March 31, 2008.