Elzéar-Henri Juchereau Duchesnay (July 19, 1809 – May 12, 1871) was a seigneur, lawyer and political figure in Canada East. He also served in the Senate of Canada from 1867 until his death. Juchereau Duchesnay, also sometimes referred to as Henri-Elzéar, was born in Beauport, Lower Canada in 1809, the son of Antoine-Louis Juchereau Duchesnay. He studied law, was called to the bar in 1832 and settled at Sainte-Marie-de-la-Beauce. In 1838, on the death of his first wife, Julie Perrault, daughter of Jean-Baptiste-Olivier Perrault, he inherited part of the seigneury of Sainte-Marie. In 1846, he became lieutenant-colonel in the local militia. He was also interested in farming and was president of the county agricultural society. He was elected to the Legislative Council of the Province of Canad