Étienne Duchesnois (July 9, 1765 – December 16, 1826) was a merchant and political figure in Lower Canada.
He represented Surrey in the Legislative Assembly of Lower Canada from 1814 to 1824.
He was born in Berthier, the son of Étienne Duchesnois and Catherine-Françoise Leroux.
Duchesnois established himself in business at Varennes.
He was also a justice of the peace and a major in the militia.