Joseph-Octave Beaubien (March 22, 1824 – November 7, 1877) was a Quebec physician and political figure. He represented Montmagny in the 1st Canadian Parliament as a Conservative member. He was born in Nicolet in Lower Canada in 1824, studied at the college there and then studied English in Rochester, New York. He returned and studied medicine, becoming a doctor in 1847 and settled at Montmagny. He was elected to represent Montmagny in the Legislative Assembly of the Province of Canada in 1857, 1861 and 1863; he was reelected after Confederation. He served in the cabinet as Commissioner of Crown Lands. He was also named to the Legislative Council of Quebec for La Durantaye division in 1867 and served until his death. He operated large farms at Montmagny and Cap-Saint-Ignace. Beaubien served