Guy–Concordia station is a Montreal Metro station in the borough of Ville-Marie in Montreal, Quebec, Canada. It is operated by the Société de transport de Montréal (STM) and serves the Green Line. The station opened on October 14, 1966, as part of the original network of the Metro. It has consistently been one of the network's busiest stations, ranking 5th from 2000 to 2001, 4th from 2002 to 2007, 3rd since 2008, and 2nd since 2021.