David Lemieux (born December 22, 1988) is a Canadian professional boxer who held the IBF middleweight title in 2015. As of April 2018, he is ranked as the world's sixth best active middleweight by the Transnational Boxing Rankings Board, seventh by The Ring magazine, and tenth by BoxRec.
Lemieux was born in Montreal, Quebec on December 22, 1988 to André Lemieux, a French Canadian, and Aznive Khavloudjian, an Armenian from Lebanon. The couple divorced after having one son, two years senior to David. David was born after the departure of his father.
His mother remarried to an Armenian, Garo Melekian, who adopted the two children and became a mentor to David. Lemieux studied at the local Saint-François-de-Laval school, in the Ahuntsic district of Montréal, but did not excel in classes, spending most of time on the streets. He was eventually expelled from the school for street fights. Encouraged by his adoptive father to focus, he started training in Ring 83 located in Ahuntsic at the invitation of boxer Baha Laham, a neighbour of Lemieux.