Louis LeBel received a B.A. from the Collège des Jésuites in Quebec City in 1958 and an LL.L. from Laval University in 1961. He was awarded the Governor General’s medal, the Lieutenant General’s medal and the Tessier silver medal. He was called to the Bar in 1962. He received a graduate degree (DES) in private law from Laval University in 1965 and an LL.M. from the University of Toronto in 1966. He practised law in Quebec City, first withLeBel, Letarte, Bilodeau, Boily from 1963 to 1964 and then with Désilets, Grondin, LeBel & Associés from 1964 to 1971, before becoming a partner at Grondin, LeBel, Poudrier, Isabel, Morin & Gagnon, where he practised from 1971 to 1984.
Louis LeBel has written various legal articles and studies, and he co-authored, with Robert-P. Gagnon and Professor Pierre Verge, Le droit du travail en vigueur au Québec, published by Les Presses de l’Université Laval. He has also been a member of various committees of the Barreau de Québec (Quebec City Bar) and the Barreau du Québec (provincial Bar association), including the editorial board of the Revue du Barreau, which he sat on from 1976 to 1982 and chaired from 1979 to 1982. He was a member of the board of directors of the Corporation du Centre communautaire juridique de Québec from 1973 to 1975, and sat before that on the legal aid committee of the Barreau de Québec. He also served as Vice-president of the Barreau du Québec from 1982 to 1983 and as Bâtonnier of Quebec from 1983 to 1984. He taught as a visiting professor at the University of Ottawa and Laval University.
He was appointed to the Quebec Court of Appeal on June 28, 1984 and to the Supreme Court of Canada on January 7, 2000. He received an LL.D. (honoris causa) from Laval University in 2001 and an LL.D. (honoris causa) from the University of Ottawa in 2010. He was also awarded the medal of the Barreau du Québec in 2000 and the medal of the Barreau de Québec in 2008. He has been an Honorary Fellow of the American College of Trial Lawyers since 2004.
Justice LeBel retired on November 30, 2014.